L1B Product Data Dictionary - ICESat - NASA

L1B Product Data Dictionary 

Granule Type Format Version Source PGE PGE Version PGE Date 

IN_H5_L1B 1.1 mabel_l1b 1.5 June 2012 

Group: metadata 

This group contains metadata regarding the source and content of this granule. This includes information such as temporal boundaries, 

parameters used in the processing software, processing information, version information and contact information. The current metadata schema is 

loosely based on the NASA ECHO metadata model and subject to change once MABEL metadata standards are defined. There is one instance of 

this group within the granule. 

Name Description Sample Value 

GranuleFormat 

HDFVersion 

Version number of the format for this granule's 

filetype. 

Version number of the HDF Library used to create 

this granule. 

1.1 

HDF5 1 8 9 

LocalGranuleID Identifying label (filename) of this granule. mabel_l1b_20110322T170130_999_1.h5 

LocalVersionID 

VersionID 

InputPointer 

Version of the granule. Processing instance for this 

Release. 

Release number of granule. Each set of granules 

corresponding to a software version is assigned a 

release number. 

Array of filenames used in the creation of this 

granule. 

1 

007 

sample_input_filename.h5 

RangeBeginningTime UTC time of the first data point within the granule. 17:01:30.000188Z


RangeEndingTime UTC time of the last data point within the granule. 17:01:59.999874Z 

RangeBeginningDate UTC date of the first data point within the granule. 2011-03-22 

RangeEndingDate UTC date of the last data point within the granule. 2011-03-22 

GranuleBeginningTime Requested UTC time of the granule start. 17:01:30.000000Z 

GranuleEndingTime Requested UTC time of the granule end. 17:02:00.000000Z 

GranuleBeginningDate Requested UTC date of the granule start. 2011-03-22 

GranuleEndingDate Requested UTC date of the granule end. 2011-03-22 

clock_freq MABEL coarse clock frequency (MHz). 295.0000 

start_gpsweek GPS week of the first data point within the granule. 1628 

end_gpsweek GPS week of the last data point within the granule. 1628 

start_gpssow 

end_gpssow 

start_latitude 

start_longitude 

end_latitude 

GPS seconds-of-week of the first data point within 

the granule. 

GPS seconds-of-week of the last data point within 

the granule. 

Best-available Latitude (product-specific) in degrees 

at first data point within the granule. 

Best-available Longitude (product-specific) in 

degrees at first point within the granule. 

Best-available Latitude (product-specific) in degrees 

at last point within the granule. 

234104.000188 

234133.999874 

36.089323 

-114.730400 

36.078871 

6


end_longitude 

Best-available Longitude (product-specific) in 

degrees at last point within the granule. 

-114.798935 

gps_seconds_offset Number of GPS seconds since GPS epoch (1980- 

01-06T00:00:00.000000Z UTC) corresponding to 

the first data point within the granule. Add this value 

to the data [delta_time] parameter to compute 

[gps_seconds] for each data point. 

984848504.000188 

instrument_short_name Instrument short name MABEL 

platform_short_name Platform short name ER-2 

sensor_short_name Sensor short name LaserAlt 

ReprocessingPlanned Reprocessing plan for creating updated granules. further update anticipated using enhanced PGE 

ReprocessingActual How many times this granule was processed. processed once 

ProductionDateTime Date/time this granule was creationed. 2012-05-25T12:56:17.000000Z 

pge_name Name of software that generated this granule. mabel_l1b 

pge_info 

Short description of software that generated this 

granule. 

MABEL L1B PGE 

pge_version Version of software that generated this granule. Version 1.5 June 2012 

pge_contact 

flight_notes 

Array of contact information for software that 

generated this granule 

Flight information provided by MABEL instrument 

team. 

John.P.Dimarzio@nasa.gov 

This is the first daytime flight, over Lake Meade and the Pacific Ocean. 

Laser is operating at 5 kHz repetition rate for this flight. No anomalies 

noted. Fourth leg over Lake Meade. Clear day. 

7


icesat2_project_scientist ICESat2 project scientist Thorsten.Markus-1@nasa.gov 

icesat2_deputy_project_scientist ICESat2 deputy project scientist Thomas.Neumann@nasa.gov 

mabel_geolocation_engineer MABEL geolocation engineer Kelly.M.Brunt@nasa.gov 

mabel_instrumentation_engineer MABEL instrumentation engineer Matthew.J.Mcgill@nasa.gov 

citation_for_external_publication 

Citation required for external publication of 

data/results. 

The data used in this study were produced by the ICESat-2 Science 

Project Office at NASA/GSFC. The data archive site is TBD. 

access_constraints Data access constraint statement. Data may not be reproduced or distributed without including the 

CitationForExternalPublication for this product included in this 

Metadata. Data may not be distributed in an altered form without the 

written permission of the ICESat-2 Science Project Office 

Group: flight_parameters 

This group contains flight and instrument-related parameters provided by the MABEL instrument team within the MABEL Day-by-Day flight log. 


Scenario_Number 

Filter_Size_1064 

Filter_Density_1064 

Scenario Number from the 

Day-by-Day flight log. 

The filter size used for each 

1064 channels, mm 

The filter density used for the 

1064 channels 

2.0000000 

1.5000000 4.0000000 

0.49100000 0.15000001 

Fiber_1064 The fiber number used for 1 2 3 4 5 6 7 8 

8


each 1064 channel 

Connector_1064 

Channel_1064 

The connector number used 

for each 1064 channel 

The TOF board channel used 


53 52 2 1 -1 -2 -27 -28 

47 48 49 50 46 45 44 43 

Power_1064_mW Power for each 1064 

channel, mW 

Filter_1064 Filter used in each 1064 

channel. 

Raw_Energy_1064_u Raw Energy for each 1064 

channel, ujoules 

Filt_Energy_1064_u Filtered Energy for each 1064 


Path_Length_1064_mm Path Length for each 1064 

channel, mm 

Angle_1064_mrad Offset angle for each 1064 

channel, mrad. 

32.000000 33.599998 25.000000 17.200001 25.200001 25.000000 20.000000 23.799999 

0.49000001 0.15000001 0.49000001 0.15000001 0.49000001 0.15000001 0.49000001 

0.15000001 

6.4000001 6.7199998 5.0000000 3.4400001 5.0999999 5.0000000 4.0000000 4.7600002 

3.1400001 1.0100000 2.4500000 0.51999998 2.5000000 0.75000000 1.9600000 0.70999998 

0.0000000 16.000000 32.000000 48.000000 65.000000 81.000000 97.000000 113.00000 

47.000000 46.000000 0.20000000 0.10000000 -0.10000000 -0.20000000 -21.000000 -22.000000 

Offset_on_Ground_1064_m 

Elevation_1064_mrad 

Filter_Size_532 

Offset on Ground for each 

1064 channel, m 

Elevation (pitch) of each 

1064 channel, mrad 

The filter size used for each 

532 channel, mm 

932.00000 912.00000 4.0000000 2.0000000 -2.0000000 -4.0000000 -416.00000 -436.00000 

1.5000000 1.5000000 2.5000000 2.0000000 1.0000000 0.50000000 1.5000000 1.5000000 

1.5000000 2.9000001 

9


Filter_Density_532 

Fiber_532 

Connector_532 

Channel_532 

Power_532_mW 

The filter density used for 


The fiber number used for 


The connector number used 


The TOF board channel used 

for each 532 channel. 

Power for each 532 channel, 

mW 

0.69099998 0.49000001 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 

-53 -52 -28 -27 -3 -2 -1 0 1 2 3 4 27 28 52 53 

2 3 1 4 16 5 15 6 14 7 13 8 12 9 11 10 

34.400002 38.000000 32.200001 35.799999 18.799999 24.700001 27.600000 26.700001 

24.500000 31.200001 30.200001 28.799999 27.500000 27.600000 31.200001 31.400000 

Filter_532 Filter used for each 532 

channel 

Raw_Energy_532_u Raw Energy for each 532 


Filtered_Energy_532_u Filtered Energy for each 532 


Path_Length_532_mm Path Length for each 532 

channel, mm 

Angle_532_mrad Offset angle for each 532 

channel, mrad. 

0.69000000 0.49000001 0.69000000 0.49000001 0.69000000 0.49000001 0.69000000 

0.49000001 0.69000000 0.49000001 0.69000000 0.49000001 0.69000000 0.49000001 

0.69000000 0.49000001 

6.8800001 7.5999999 6.4400001 7.1599998 3.7600000 4.9400001 5.5200000 5.3400002 

4.9000001 6.2399998 6.0400000 5.7600002 5.5000000 5.5200000 6.2399998 6.2800002 

4.7500000 3.7200000 4.4400001 3.5100000 2.5899999 2.4200001 3.8099999 2.6199999 

3.3800001 3.0599999 4.1700001 2.8199999 3.8000000 2.7000000 4.3099999 3.0799999 

27.000000 43.000000 59.000000 75.000000 92.000000 108.00000 124.00000 140.00000 

156.00000 172.00000 188.00000 204.00000 221.00000 237.00000 253.00000 269.00000 

-47.000000 -46.000000 -22.000000 -21.000000 -1.0000000 -0.20000000 -0.10000000 0.0000000 

0.10000000 0.20000000 1.0000000 1.8000000 21.000000 22.000000 46.000000 47.000000 

Offset_on_Ground_532_m 

Offset on Ground for each 

channel beam, m 

-932.00000 -912.00000 -436.00000 -416.00000 -20.000000 -4.0000000 -2.0000000 0.0000000 

2.0000000 4.0000000 20.000000 36.000000 416.00000 436.00000 912.00000 932.00000 

10


Elevation_532_mrad Elevation (pitch) of each 532 

channel, mrad 

-1.5000000 -1.5000000 -1.5000000 -1.5000000 -1.5000000 -2.5000000 -2.0000000 -1.5000000 - 

1.0000000 -0.50000000 -1.5000000 -2.5000000 -1.5000000 -1.5000000 -1.5000000 -1.5000000 

Offset2_on_Ground_532_m 

Flight_Number 

2nd Offset on Ground for 

each channel beam, m 

Flight Number from the Dayby-Day 

flight log. 

-30.000000 -30.000000 -30.000000 -30.000000 -30.000000 -50.000000 -40.000000 -30.000000 - 

20.000000 -10.000000 -30.000000 -50.000000 -30.000000 -30.000000 -30.000000 -30.000000 

1 

Flight_Start_UTC Start UTC time for this flight. 2011-03-24 

Flight_Start_GPS_Seconds 

Flight_Location 

Start GPS Seconds for this 

flight. 

Flight location from the Dayby-Day 

flight log. 

984960014.00000000 

Dryden 

GPS_Rate GPS data sample rate, hz. 2 

IMU_Rate IMU data sample rate, hz. 2 

Laser_Rate Laser fire repetition rate, hz. 5000 

Group: /range 

This group contains subgroups of per-channel range parameters. Each range has been corrected for oscillator rate and fiber bias. There is one 

instance of this group within the granule. There is one range channel subgroup for each channel configured on the instrument. 

Group: /range/channelxxx 

This group contains calibrated range parameters. Each range has been corrected for oscillator rate and fiber bias. There is one instance of this 

group for each channel configured on the instrument. 

11

Label Datatype Rank long_name standard_name units hertz description source coordinates 

delta_time DOUBLE 1 delta_time time seconds 5000 Elapsed 

seconds since 

first data point 

in granule 

i_shot_num INTEGER 1 shot_number counter count 5000 Shot Number, 

copied from the 

L1A shottag 

packet. 

calibrated_range_m REAL 1 calibrated_range_m range meters 5000 Range, 

corrected for 

oscillator and 

fiber path 

length. 

Derived 

(gps_secondsgps_second_offset) 

L1A Shottag packet 

Derived (L1A range * 

osc_corr) - 

fiber_path_length 

time 

time 

time 

Group: /novatel_ins 

This group contains data from L1A INS files. The L1A INS is created using NOVATEL software and delivered as an L1A file. Note that this group 

has a extra second of data at the beginning and end of the granule to insure good interpolation data for L2A gelocoaton. There is one instance of 

this group within the granule. 

Group: /novatel_ins/time 

This group contains time related parameters from L1A INS files. These parameters indicate the time of each corresponding INS parameter. There 

is one instance of this group within the novatel_ins group. 


delta_time DOUBLE 1 elapsed time time seconds 100 Elapsed seconds 

since first TOF data 

point in granule 

Derived (gps_secondsmetadata.gps_sec_offset) 

latitude 

longitude time 

12


gps_sow DOUBLE 1 gps seconds 

of week 

time seconds 100 GPS seconds of 

week corrected for 

receiver clock bias 

L1A INS Data 

latitude 


gps_week INTEGER 1 gps week time weeks 100 GPS week number L1A INS Data latitude 


Group: /novatel_ins/geolocation 

This group contains gelocation-related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


latitude DOUBLE 1 latitude latitude degrees_north 100 Latitude, WGS84, North=+ L1A INS 

Data 

longitude DOUBLE 1 longitude longitude degrees_east 100 Longitude, WGS84, East=+ L1A INS 


latitude longitude 

time 


time 

ht_ell DOUBLE 1 Height above 

ellipsoid 

height meters 100 Height above WGS84 

ellipsoid 

L1A INS 



time 

comb_sd REAL 1 Combined standard 

deviation 

deviation meters 100 Combined N, E, and Hgt 

standard deviation 

L1A INS 



time 

Group: /novatel_ins/ecef 

This group contains ecef related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


13


x_ecef DOUBLE 1 x_ecef x_ecef meters 100 X, earth-centered earth-fixed frame L1A INS Data latitude longitude time 

y_ecef DOUBLE 1 y_ecef y_ecef meters 100 Y, earth-centered earth-fixed frame L1A INS Data latitude longitude time 

z_ecef DOUBLE 1 z_ecef z_ecef meters 100 Z, earth-centered earth-fixed frame L1A INS Data latitude longitude time 

x_ecef_sd REAL 1 x_ecef_sd x_ecef_sd meters 100 standard deviation of x_ecef L1A INS Data latitude longitude time 

y_ecef_sd REAL 1 y_ecef_sd y_ecef_sd meters 100 standard deviation of y_ecef L1A INS Data latitude longitude time 

z_ecef_sd REAL 1 z_ecef_sd z_ecef_sd meters 100 standard deviation of z_ecef L1A INS Data latitude longitude time 

Group: /novatel_ins/attitude 

This group contains attitude related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


roll DOUBLE 1 roll roll degrees 100 Roll angle computed by GPS/INS 

routines 

pitch DOUBLE 1 pitch pitch degrees 100 Pitch angle computed by GPS/INS 

routines 

heading DOUBLE 1 heading heading degrees 100 Heading angle computed by 

GPS/INS routines 

L1A INS 


L1A INS 


L1A INS 



time 


time 


time 

roll_sd REAL 1 roll_sd roll_sd degrees 100 standard deviation of roll L1A INS 


pitch_sd REAL 1 pitch_sd pitch_sd degrees 100 standard deviation of pitch L1A INS 



time 


time 

14


heading_sd REAL 1 heading_sd heading_sd degrees 100 standard deviation of heading L1A INS 



time 

Group: /novatel_ins/solar_angle 

This group contains solar angle related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


solar_azimuth REAL 1 Solar 

Azimuth 

solar_azimuth degrees 100 Azimuth of the sun from true north, 

at position and time 

L1A INS 



time 

solar_elevation REAL 1 Solar 

Elevation 

solar_elevation degrees 100 elevation of sun above horizon, at 

position and time 

L1A INS 



time 

Group: /novatel_ins/flags 

This group contains status related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


num_gps_sat INTEGER 1 Number of GPS 

Satellites 

status count 100 Number of GPS satellites in 

observation 

L1A 

INS 


latitude 


quality_num INTEGER 1 quality_num status flag 100 Quality factor (integer: 1=best; 

6=worst) 

i_flag INTEGER 1 imu_flag status flag 100 IMU Status - (0=ideal), where : 0=GPS 

position computed and used; 1=GPS 

L1A 

INS 


L1A 

INS 

latitude 


latitude 

15


range update applied; 2=no update 

applied (free mode); 3=zero velocity 

update applied (not moving); 4=phase 

update applied. 

bad_field_count INTEGER 1 bad_field_count status count 100 Number of fields in this INS record that 

were determined as bad uponinput of 

the L1A INS data. These fields are 

generally filled with a value of -9999.99 


L1A 

INS 



latitude 


Group: /novatel_ins/sta 

This group contains sta related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


pdop REAL 1 position dilution of 

precision 

pdop NA 100 position dilution of precision (indicator 

of x, y, z geometry) 

L1A INS 



time 

Group: /novatel_ins/rms 

This group contains rms quality related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


l1_rms REAL 1 l1_rms error NA 100 L1 RMS error L1A INS Data latitude longitude time 

ca_rms REAL 1 ca_rms rms NA 100 C/A code RMS error L1A INS Data latitude longitude time 

16

Group: /novatel_ins/location 

This group contains location related parameters from L1A INS files.There is one instance of this group within the novatel_ins group. 


v_east REAL 1 v_east velocity meters per 

second 

100 Velocity component in the local 

level east axis 

L1A INS 



time 

v_north REAL 1 v_north velocity meters per 

second 


level north axis 

L1A INS 



time 

v_up REAL 1 v_up velocity meters per 

second 


level vertical axis 

L1A INS 



time 

Group: /housekeeping 

This group contains data from the L0 housekeeping data file. There is one instance of this group within the granule 

Label 

Dataty 

pe 

Ran 

k 

long_nam 

e 

standard_name units hert 

z 

description source coordinat 

es 

delta_time 

DOUBL 

E 

1 Delta Time time seconds 1 Elapsed seconds since 

first data point in granule 

Derived 

(gps_secondsmetadata.gps_sec_off 

set) 

goodcommandcoun 

t 

INTEG 

ER 

1 good 

command 

count 

good_command_c 

ount 

counts 1 Number of good 

commands received by 

the instrument. 

L0 HK Packet 

latitude 

longitude 

time 

badcommandcount 

INTEG 

ER 

1 bad 

command 

count 

bad_command_co 

unt 

counts 1 Number of bad 

commands received by 

the instrument. 

L0 HK Packet 

latitude 

longitude 

time 

17

Label 


pe 

Ran 

k 

long_nam 

e 


z 


es 

controlstate 

INTEG 

ER 

1 control 

state 

control_state status 1 The operating mode the 

instrument software is in. 

L0 HK Packet 

latitude 

longitude 

time 

controlsubmode 

INTEG 

ER 

1 control 

submode 

control_submode status 1 The submode of the 

operating mode. 

L0 HK Packet 

latitude 

longitude 

time 

laserstate 

U8LE 

INTEG 

ER 

1 laser state laser_state status 1 The current state the 

laser is in. 

L0 HK Packet 

latitude 

longitude 

time 

lasergoalstate 

U8LE 

INTEG 

ER 

1 laser goal 

state 

laser_goal_state status 1 The state the software 

wants the laser to be in. 

L0 HK Packet 

latitude 

longitude 

time 

laserstatus_1 

U8LE 

INTEG 

ER 

1 laser status 

1 

laser_status_1 status 1 Fault bits: 0=OSC temp; 

1=AMP1 temp; 2=AMP2 

temp; 3-AMP3 temp; 

4=unused; 5=SGH temp; 

6=OSC over current; 

7=AMP over current 

L0 HK Packet 

latitude 

longitude 

time 

laserstatus_2 

U8LE 

INTEG 

ER 

1 LaserStatu 

s_2 

STANDARD_NA 

ME 

UNITS 1 Bits: 0=unused; 

[12]=[00]Sleep, 

[01]STANDBY, 

[10]Ready, [11]Fire; 

3=flow fault; 4=ARM 

active; 5=Bad Packet 

Chksum; 6=Invalid CMD; 

7=unused 

L0 HK Packet 

latitude 

longitude 

time 

laserstatus_runtime 

U32LE 

INTEG 

1 laser status 

runtime 

laser_status_runti 

me 

seconds 1 Accumulated laser run 

time in seconds. 

L0 HK Packet 

latitude 

longitude 

18

Label 


pe 

Ran 

k 

long_nam 

e 


z 


es 

ER 

time 

lasertemperature 

U8LE 

INTEG 

ER 

2 laser 

temperatur 

e 

temperature degrees C 1 Array of 6 laser 

temperatures 

L0 HK Packet 

latitude 

longitude 

time 

reprate 

U16LE 

INTEG 

ER 

1 reprate rep_rate hertz 1 The current repetition rate 

of the laser. 

L0 HK Packet 

latitude 

longitude 

time 

pidtemperatures REAL 2 pid 

temperatur 

e 

temperature degrees C 1 Array of 4 temperature 

readings from the PID 

controllers. 

L0 HK Packet 

latitude 

longitude 

time 

advoltages REAL 2 thermistor 

temperatur 

es 

temperature degrees C 1 Array of 32 thermistor 

temperatures (see 

MABEL Users Guide) 

Derived : 

ADVoltages=(81.6323 

*ADVoltages)+259.68 

3 

latitude 

longitude 

time 

proportionalvalvevo 

ltage 

REAL 2 proportiona 

l valve 

voltages 

voltage volts 1 Array of 2 control 

voltages supplied to the 

proportional valves. 

L0 HK Packet 

latitude 

longitude 

time 

detectorvoltage REAL 1 detector 

voltage 

voltage volts 1 The voltage supplied to 

the detector. 

L0 HK Packet 

latitude 

longitude 

time 

pumpenablevoltage REAL 1 pump 

enable 

voltage 

voltage volts 1 The voltage supplied to 

turn on the cooling fluid 

pump. 

L0 HK Packet 

latitude 

longitude 

time 

tofcardseenmask 

U8LE 

INTEG 

ER 

1 TOF card 

seen mask 

tof_card_seen_m 

ask 

status 1 Bits indicate from which 

TOF card we are 

receiving data. Bits: 

0=TOF1; 1=TOF2; 

L0 HK Packet 

latitude 

longitude 

time 

19

Label 


pe 

Ran 

k 

long_nam 

e 


z 


es 

2=unused; 3=CPU HD 

seen; 4=TOF1 HD seen; 

5=TOF2 HD seen; 6=set 

using PC time; 7=set 

using GPS time. 

tof1_currentsector 

U8LE 

INTEG 

ER 

2 TOF1 

current 

sector 

sector status 1 (Array of 6 bytes) The 

current sector that the 

TOF1 card will write to. 

L0 HK Packet 

latitude 

longitude 

time 

tof1_shotcounter 

U32LE 

INTEG 

ER 

1 TOF1 shot 

counter 

shot_counter counts 1 The shot counter of the 

TOF1 card. This indicates 

how many laser shots the 

card has seen. 

L0 HK Packet 

latitude 

longitude 

time 

tof1_gpsweek 

INTEG 

ER 

1 TOF1 gps 

week 

time weeks 1 GPS week reported by 

the TOF1 card. 

L0 HK Packet 

latitude 

longitude 

time 

tof1_gps_sow REAL 1 TOF1 gps 

seconds of 

week 

time seconds 1 The GPS seconds-ofweek 

reported by the 

TOF1 card. 

L0 HK Data (scaled 

from ms to s) 

latitude 

longitude 

time 

tof1_overview 

U8LE 

INTEG 

ER 

1 TOF1 

CardOvervi 

ew 

card_overview status 1 Register bits: 0=channel 

(0=low,1=hi); 1=collecting 

data; 2=ready go in; 

3=serial port; 4=temp 

sens SMB err; 5=SP 

watchdog err; 6=unused; 

7=mem buff ready 

L0 HK Packet 

latitude 

longitude 

time 

tof2_currentsector 

U8LE 

INTEG 

ER 

2 TOF2 

current 

sector 

sector status 1 (Array of 6 bytes) The 

current sector that the 

TOF2 card will write to. 

L0 HK Packet 

latitude 

longitude 

time 

20

Label 


pe 

Ran 

k 

long_nam 

e 


z 


es 

tof2_shotcounter 

U32LE 

INTEG 

ER 

1 TOF2 shot 

counter 

shot_counter counts 1 The shot counter of the 

TOF2 card. This indicates 

how many laser shots the 

card has seen. 

L0 HK Packet 

latitude 

longitude 

time 

tof2_gpsweek 

INTEG 

ER 

1 TOF2 gps 

week 

time weeks 1 GPS week reported by 

the TOF2 card. 

L0 HK Packet 

latitude 

longitude 

time 

tof2_gps_sow REAL 1 TOF2 gps 

seconds of 

week 

time seconds 1 The GPS seconds-ofweek 

reported by the 

TOF2 card. 

L0 HK Packet (scaled 

from ms to s) 

latitude 

longitude 

time 

tof2_overview 

U8LE 

INTEG 

ER 

1 TOF2 

CardOvervi 

ew 

card_overview status 1 Register bits: 0=channel 

(0=low,1=hi); 1=collecting 

data; 2=ready go in; 



watchdog err; 6=unused; 

7=mem buff ready 

L0 HK Packet 

latitude 

longitude 

time 

gpsweek 

INTEG 

ER 

1 GPS week time weeks 1 The GPS reported week 

number. 

L0 HK Packet 

latitude 

longitude 

time 

gps_sow REAL 1 GPS 

secondsof-week 

time seconds 1 The GPS reported 

seconds-of-week. 


from ms to s) 

latitude 

longitude 

time 

latitude REAL 1 latitude latitude degrees_n 

orth 

1 GPS Reported Latitude. 

North is positive 


by 100) 

time 

latitude 

longitude REAL 1 longitude longitude degrees_e 

ast 

1 GPS reported longitude. 

West is negative 


by 100) 

time 

latitude 

21

Label 


pe 

Ran 

k 

long_nam 

e 


z 


es 

altitude REAL 1 altitude altitude meters 1 GPS reported altitude. L0 HK Packet latitude 

longitude 

time 

laserenergy REAL 1 laser 

energy 

energy watts 1 TBD Laser Energy 

Monitor reading 

L0 HK Packet 

latitude 

longitude 

time 

etalonsetpoint REAL 1 etalon set 

point 

temperature degrees C 1 Etalon Set Point L0 HK Packet latitude 

longitude 

time 

etalontemperatures REAL 2 etalon 

temperatur 

es 

temperature degrees C 1 Array of 3 etalon 

temperatures 

L0 HK Packet 

latitude 

longitude 

time 

Group: /tofx 

This group contains data specific to the each TOF card. Card-specific data types include TOF Status and Oscillator Correction data. There is one 

instance of this group for each card used to collect data. 

Group: /tofx/osc_corr 

This group contains the derived L1B oscillator correction data. This correction has been applied to the L1B range data within this file. Since the 

oscillator correction is TOF hardware-dependent, there is one instance of this group for each TOF card in use. 

Label 

Datatyp 

e 

Ran 

k 

long_nam 

e 

standard_nam 

e 

units 

hert 

z 

description source coordinate 

s 

delta_tim 

e 

DOUBL 

E 

1 Delta Time time second 

s 

0 Elapsed seconds since first data point 

in granule 

Derived (gps_secondsmetadata.gps_sec_offs 

22

Label 


e 

Ran 

k 

long_nam 

e 

standard_nam 

e 

units 

hert 

z 

description source coordinate 

s 

et) 

osc_corr 

DOUBL 

E 

1 oscillator 

correction 

range 

correction 

hertz 0 osc_corr is a hardware-dependent 

frequency-based correction for range. It 

is derived by computing the deltas of 

corresponding TOF status gps_sow 

and PPSTag values and using the 

equation provided. 

Derived: 

osc_corr=(2.95d8*delta 

_gps_sow)/(32*delta_P 

PSTag) 

time 

osc_flag 

U8LE 

INTEGE 

R 

1 oscillator 

correction 

flag 

flag flag 0 The osc_corr flag is use to determine if 

the corresponding osc_corr is within 

valid bounds. A non-zero value 

indicates the corresponding osc_corr 

should not be used as a range 

correction 

Derived: set to 1 if 1.05 

< osc_corr > 0.95 

time 

Group: /tofx/status 

This group contains data from the L0 TOF Status Data file. The TOF card is polled for this information once a second. These packets are stored at 

a programmable rate. That rate is currently once every 10 seconds. There is one instance of this group for each TOF card used. 

Label 


e 

Ran 

k 

long_name standard_name units hertz description source coordinat 

es 

delta_time 

DOUBL 

E 

1 Delta Time time seconds 0.100000 

00 

Elapsed seconds 

since first data point in 

granule 

Derived 

(gps_secon 

dsmetadata.g 

ps_sec_off 

set) 

currentshotcounter INTEGE 1 CurrentShotCounter shot_counter counts 0.100000 The shot counter of 

the TOF card. This 

L0 TOF 

Status 

time 

23

Label 


e 

Ran 

k 


es 

R 00 tells us how many 

laser shots the card 

has seen. 


gpsweek 

INTEGE 

R 

1 gps week time weeks 0.100000 

00 

The GPS Week 

indicated by the TOF 

card. 

L0 TOF 

Status 


time 

gps_sow 

DOUBL 

E 

1 gps seconds of week time seconds 0.100000 

00 

The GPS seconds-ofweek 

indicated by the 

TOF card . 

L0 TOF 

Status 


(scaled 

from ms to 

s) 

time 

wedgecounts 

INTEGE 

R 

2 WedgeCounts wedge_counts counts 0.100000 

00 

(Array of 3) Unused in 

MABEL 

L0 TOF 

Status 


time 

tagcountpershot 

Unknow 

n 

1 TagCountPerShot tag_count counts 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

millisecond 

Unknow 

n 

1 Millisecond time ms 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

cardoverview 

U8LE 

INTEGE 

R 

1 CardOverview card_overview status 0.100000 

00 

Register bits: 

0=channel 

(0=low,1=hi); 

1=collecting data; 

2=ready go in; 



watchdog err; 

L0 TOF 

Status 


time 

24

Label 


e 

Ran 

k 


es 

6=unused; 7=mem 

buff ready 

fpga_version 

U8LE 

INTEGE 

R 

1 FPGA_Version fpga_version status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

ppstag 

U32LE 

INTEGE 

R 

1 PPSTag pps_tag counter 0.100000 

00 

Oscillator tick counter 

L0 TOF 

Status 


time 

osc_start_reg 

U16LE 

INTEGE 

R 

2 Osc_Start_Reg osc_start_reg status 0.100000 

00 

(Array of 3) TBD 

L0 TOF 

Status 


time 

osc_parm_reg 

U16LE 

INTEGE 

R 

2 Osc_Parm_Reg osc_parm_reg status 0.100000 

00 


L0 TOF 

Status 


time 

thres_reg 

U16LE 

INTEGE 

R 

2 Thres_Reg thres_reg status 0.100000 

00 


L0 TOF 

Status 


time 

laser_prf_reg 

U16LE 

INTEGE 

R 

1 Laser_PRF_Reg laser_prf_reg status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

digital_potent_tol 

U16LE 

INTEGE 

R 

1 Digital_Potent_Tol digital_potent_tol status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

pmt_settings 

U16LE 

INTEGE 

R 

2 PMT_Settings pmt_settings status 0.100000 

00 


L0 TOF 

Status 


time 

25

Label 


e 

Ran 

k 


es 

tof_timing_settings 

U16LE 

INTEGE 

R 

2 TOF_Timing_Setting 

s 

tof_timing_settings status 0.100000 

00 


L0 TOF 

Status 


time 

start_pulse_setting 

s 

U16LE 

INTEGE 

R 

2 Start_Pulse_Settings start_pulse_setting 

s 

status 0.100000 

00 


L0 TOF 

Status 


time 

sfdpsettings 

U16LE 

INTEGE 

R 

2 sFDPSettings spdp_setting status 0.100000 

00 


MABEL. 

L0 TOF 

Status 


time 

tof_fpga_status 

U8LE 

INTEGE 

R 

1 TOF_FPGA_Status fpga_status status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

dac_values 

U16LE 

INTEGE 

R 

2 DAC_Values dac_values status 0.100000 

00 


MABEL. 

L0 TOF 

Status 


time 

discrete_out_reg 

U16LE 

INTEGE 

R 

1 Discrete_Out_Reg discrete_out_reg status 0.100000 

00 

Unused in MABEL. 

L0 TOF 

Status 


time 

user_marker 

U8LE 

INTEGE 

R 

2 User_Marker user_marker status 0.100000 

00 


L0 TOF 

Status 


time 

wedge_blanking_ti 

me 

U8LE 

INTEGE 

R 

1 Wedge_Blanking_Ti 

me 

wedge_blanking_ti 

me 

status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

pmt_spi_reg 

U16LE 

INTEGE 

2 PMT_SPI_Reg pmt_spi_reg status 0.100000 

00 


L0 TOF 

Status 

time 

26

Label 


e 

Ran 

k 


es 

R 


card_config_reg 

U16LE 

INTEGE 

R 

1 Card_Config_Reg card_config_reg status 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

tof_chip_temperat 

ure 

U16LE 

INTEGE 

R 

1 TOF_Chip_Temperat 

ure 

temperature 

degrees 

C 

0.100000 

00 

TBD 

L0 TOF 

Status 


time 

temp_sensor 

U8LE 

INTEGE 

R 

1 Temp_Sensor temperature degrees 

C 

0.100000 

00 

TBD 

L0 TOF 

Status 


time 

adc_temperature 

U16LE 

INTEGE 

R 

1 ADC_Temperature temperature degrees 

C 

0.100000 

00 

TBD 

L0 TOF 

Status 


time 

voltage_monitor 

U16LE 

INTEGE 

R 

2 Voltage_Monitor voltage volts 0.100000 

00 


L0 TOF 

Status 


time 

hd_memory_buff 

U16LE 

INTEGE 

R 

1 HD_Memory_Buff hd_memory_buff bytes 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

hd_start_sector 

U8LE 

INTEGE 

R 

2 HD_Current_Sector hd_current_sector sectors 0.100000 

00 


L0 TOF 

Status 


time 

hd_current_sector 

U8LE 

INTEGE 

R 

2 HD_Current_Sector hd_current_sector sectors 0.100000 

00 

TBD 

L0 TOF 

Status 


time 

27

Label 


e 

Ran 

k 


es 

hd_capacity_reg 

U16LE 

INTEGE 

R 

1 HD_Capacity_Reg hd_capacity_reg bytes 0.100000 

00 


L0 TOF 

Status 


time 

Group: /quality_assessment 

This group contains quality assessment data which contains counters and summary statistics which can be used to assess the quality of the data 

Group: /quality_assessment/summary 

This group contains summary quality assessment information. 

Name 

number_of_shots_min 

number_of_shots_mean 

number_of_shots_max 

number_of_shots_sdev 

number_of_shots_n_points 

ranges_per_shot_min 

ranges_per_shot_mean 

ranges_per_shot_max 

ranges_per_shot_sdev 

Description 

The number of shots fired by the laser. The minumum value of the parameter. 

The number of shots fired by the laser. The mean value of the parameter. 

The number of shots fired by the laser. The maximum value of the parameter. 

The number of shots fired by the laser. The standard deviation of the parameter. 

The number of shots fired by the laser. Number of points used to compute the statistic. 

The number of ranges detected per shot. The minumum value of the parameter. 

The number of ranges detected per shot. The mean value of the parameter. 

The number of ranges detected per shot. The maximum value of the parameter. 

The number of ranges detected per shot. The standard deviation of the parameter. 

28

Name 

ranges_per_shot_n_points 

Description 

The number of ranges detected per shot. Number of points used to compute the statistic. 

Group: /quality_assessment/along_track 

This group contains along-track statistics. Statistics are computed and reported at pre-defined intervals. 

Name 

Description 

start_of_interval 

end_of_interval 

number_of_shots_ch_xxx 

ranges_per_shot_ch_xxx 

The starting time of the along-track interval. 

The ending time of the along-track interval. 

The number of shots fired by the laser. 

The number of ranges detected per shot. 

Group: /quality_assessment/packet_counts 

This group contains statistics regarding the number of packets. 

Name 

Description 

ins_total 

ins_good 

ins_skipped 

channelxxx_total 

Novatel/INS records. Total number of records seen during processing. 

Novatel/INS records. Number of good records used during processing. 

Novatel/INS records. Number of records skipped during processing. 

Channel-specific range records. Total number of records seen during processing. 

29

Name 

channelxxx_good 

channelxxx_skipped 

Description 

Channel-specific range records. Number of good records used during processing. 

Channel-specific range records. Number of records skipped during processing. 

30

L1B Product Data Dictionary - ICESat - NASA

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