Bernese GPS Software Version 5.0 - Bernese GNSS Software

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14. Clock Estimation SINGLE POINT POSITIONING SOLUTIONS: GEOCENTRIC COORDINATES IN WGS-84 -------------------------------------------------------------------- STATION NAME SESS F FR C T I EL NS DT #OBS RMS(M) X (M) ... ---------------------------------------------------------------------------- ... BRUS 13101M004 1390 0 L3 2 E N 20 1 300 1685 0.11 4027893.7657 ... FFMJ 14279M001 1390 0 L3 2 E N 20 1 300 152288518.43 4053455.8925 ... MATE 12734M008 1390 0 L3 2 E N 20 1 300 1491 0.22 4641949.5830 ... ONSA 10402M004 1390 0 L3 2 E N 20 1 300 1736 0.10 3370658.5653 ... PTBB 14234M001 1390 0 L3 2 E N 20 1 300 1679 0.13 3844059.9728 ... VILL 13406M001 1390 0 L3 2 E N 20 1 300 1743 1.36 4849833.7038 ... ZIMJ 14001M006 1390 0 L3 2 E N 20 1 300 171975934.86 4331293.9409 ... ZIMM 14001M004 1390 0 L3 2 E N 20 1 300 1708******** 4331297.0766 ... ---------------------------------------------------------------------------- ... Figure 14.8: Summary for satellite clock validation for session 1390 of year 2003 from program CODSPP. the receiver clocks for some of the stations (BRUS, ONSA, and PTBB) can be nicely modeled assuming a linear behavior of the receiver clock (RMS is below 0.15. ..0.20 m). This confirms the alignment as well as the consistency between the satellite clock corrections, satellite orbits, and ERPs. It does not matter if the RMS “explodes” for some stations. The receiver clocks in Zimmerwald (ZIMJ and ZIMM) can obviously not be represented by a linear model. If using the program CODSPP for satellite clock validation purposes only it makes sense to disable the option “Save clock estimates” in panel “CODSPP 2: Input Options”. Validation of External Satellite Clocks Another task may be the validation of the consistency of satellite positions, satellite clock corrections from an external precise orbit file, and the external ERPs. A precise point positioning using the program GPSEST can be used for this purpose. As a first step you have to generate a standard orbit from the precise orbit file and to convert the ERPs into the Bernese format following the instructions in Chapter 5. When you extract the satellite clock corrections with program PRETAB you have to write the unmodified values (no polynomial fit) into the Bernese satellite clock file (set the both options “Interval for polynomials” and “Polynomial degree” in panel “PRETAB 3: Options for Clocks” to zero). Specify the “Sampling interval” in panel “GPSEST 3.1: General Options 1” according to the sampling of the satellite clocks (e.g., 900 seconds). The a posteriori sigma of unit weight in the GPSEST run with the observations from any station is expected to be about 1 or 2 mm when introducing the satellite orbits, Earth orientation parameters, and the satellite clocks if all information is consistent (see Section 7.8.1 for more information). Page 306 AIUB
14.5 Generation of High Rate Clocks Using Program CLKEST 14.5 Generation of High Rate Clocks Using Program CLKEST Program CLKEST allows to generate high rate clocks in an efficient way. It is based on known orbit, station coordinate, and station troposphere information that is, e.g., obtained from a global network double-difference solution (troposphere delays may also be obtained from a model). Only clock parameters remain as unknowns in the observation equations of the ionosphere free linear combination with this information introduced as known. The program uses pseudorange and carrier phase observations from a (preferentially global) network of tracking stations. In a first step pseudorange observations are screened and receiver clocks synchronized. Clock parameters are then computed from the pseudorange observations for each satellite clock and each involved station clock for each observation epoch. In a second step carrier phase epochdifferences are formed for each clock and each observation epoch-difference, screened, and used to compute clock epoch differences for each clock and each observation epoch-difference. This second step allows to get rid of the phase ambiguities. Cycle slips are identified as outliers in the phase epoch differences. In the third and last step pseudorange derived clock values and carrier phase derived clock epoch-differences are combined independently for each clock using an efficient algorithm (option TRIDIAG). The singularity in the system is avoided by either fixing the values of one reference clock or the mean of an ensemble of clocks. The procedure is very fast and allows the processing of data at high rate for a large network of stations. Drawbacks are, on one hand, missing covariance information (not provided by the efficient algorithm), on the other hand, and more importantly, neglected correlations between successive clock epoch-differences. These missing correlations are equivalent to the estimation of individual ambiguities for each epoch difference and are the cause for a variation of the estimated clocks in a band of about ±1 ns around the true values. This pseudo-random walk may be reduced by lowering the relative weight of the pseudorange observation with respect to the carrier phase observations. Alternatively only a time-averaged pseudorange clock value may be used to define the datum of the carrier phase clock time series obtained by integrating the clock epoch-differences (option SUM CONDITION). Finally, it is also possible to constrain the carrier phase clock time series at specific epochs to precise clocks that are available (e.g., every 5 minutes) from another source (option “Fix on a-priori clocks”). This later procedure is used at CODE to densify the 5 minutes precise clocks to 30 seconds high rate clocks [Bock et al., 2000]. The program may only be started using the RUNGPS command (see Section 18.8). Bernese GPS Software Version 5.0 Page 307
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Bernese GPS Software Version 5.0 Ed
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Bernese GPS Software Version 5.0 As
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Contents 2.3.6.1 Ionosphere-Free Li
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Contents 6.3.3 Kinematic Stations .
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Contents 9.4.4 Pre-Elimination Opti
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Contents 13.2 How to Correct P1-P2
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Contents 18.3.2 Command Bar . . . .
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Contents 20.4 Description of the Pr
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Contents 22.8.2 Station Abbreviatio
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Contents Page XVI AIUB
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List of Figures 5.1 Flow diagram of
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List of Figures 13.3 P1-C1 code bia
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List of Figures 22.20 Tabular orbit
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List of Tables 12.2 Influences of t
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1. Introduction and Overview • bu
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1. Introduction and Overview Table
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1. Introduction and Overview • Th
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1. Introduction and Overview The Be
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1. Introduction and Overview for Ca
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2. Fundamentals 2.1.1 GPS System De
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2. Fundamentals Table 2.2: Componen
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2. Fundamentals Clock correction [n
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2. Fundamentals Figure 2.5: GLONASS
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2. Fundamentals Table 2.6: GLONASS
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2. Fundamentals In contrast to the
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2. Fundamentals 2.2 GNSS Satellite
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2. Fundamentals 2.2.2.1 The Kepleri
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2. Fundamentals Table 2.9: Perturbi
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2. Fundamentals R.A. of Ascending N
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2. Fundamentals where aROCK is the
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2. Fundamentals By taking the deriv
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2. Fundamentals δi error of satell
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2. Fundamentals Ionospheric refract
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2. Fundamentals 2.3.6.1 Ionosphere-
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2. Fundamentals Table 2.10: Linear
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3. Campaign Setup variable to the f
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3. Campaign Setup Figure 3.1: Examp
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3. Campaign Setup In this section w
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3. Campaign Setup 3.5 Processing Ov
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4. Import and Export of External Fi
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5. Preparation of Earth Orientation
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6. Data Preprocessing Preprocessing
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6. Data Preprocessing (a) AS turned
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6. Data Preprocessing 6.2.4 Code Sm
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6. Data Preprocessing is set to 2.
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6. Data Preprocessing 6.3.2 Preproc
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6. Data Preprocessing RMS of kin. s
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6. Data Preprocessing The ambiguiti
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6. Data Preprocessing no loss of si
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6. Data Preprocessing This epoch-di
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6. Data Preprocessing result in lar
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6. Data Preprocessing (e.g., from C
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6. Data Preprocessing The second pa
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6. Data Preprocessing GAR small pie
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6. Data Preprocessing -------------
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6. Data Preprocessing automated pro
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6. Data Preprocessing 6.6.2 Generat
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6. Data Preprocessing 6.6.3 Detect
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6. Data Preprocessing (6) If the to
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6. Data Preprocessing Page 138 AIUB
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7. Parameter Estimation p u × 1 ve
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7. Parameter Estimation The two bas
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7. Parameter Estimation contains a
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7. Parameter Estimation The binary
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7. Parameter Estimation 7.5.2 Piece
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7. Parameter Estimation The equatio
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7. Parameter Estimation 7.5.4.4 Fix
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7. Parameter Estimation where Q 11
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7. Parameter Estimation consequence
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7. Parameter Estimation are address
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7. Parameter Estimation ... ! Pre-p
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7. Parameter Estimation The RINEX m
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7. Parameter Estimation In a succes
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7. Parameter Estimation Page 166 AI
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8. Initial Phase Ambiguities and Am
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9. Combination of Solutions 9.2 Seq
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9. Combination of Solutions Substit
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9. Combination of Solutions We may
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9. Combination of Solutions files a
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9. Combination of Solutions x x 1 t
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9. Combination of Solutions Both re
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9. Combination of Solutions 9.4 The
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9. Combination of Solutions 9.4.2 G
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9. Combination of Solutions Excepti
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9. Combination of Solutions As alre
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9. Combination of Solutions Table 9
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9. Combination of Solutions The poi
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9. Combination of Solutions (2) Tra
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9. Combination of Solutions Step 1:
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10. Station Coordinates and Velocit
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Page 220 AIUB Station coordinates a
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11. Troposphere Modeling and Estima
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12. Ionosphere Modeling and Estimat
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Page 318 and 319: 14. Clock Estimation τ (BRUS-PTBB)
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Page 338 and 339: 15. Estimation of Satellite Orbits
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18. The Menu System 18.2 Starting t
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18. The Menu System 18.3.1 Menu Bar
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18. The Menu System 18.3.5 Panel Co
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18. The Menu System the menu the ne
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18. The Menu System Table 18.1: Pre
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18. The Menu System 18.5.3 System E
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18. The Menu System 18.7 Change Opt
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18. The Menu System 18.9 Technical
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18. The Menu System ... ! Environme
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18. The Menu System The keyword ENV
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18. The Menu System ! List of Remai
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18. The Menu System The MENUAUX-mec
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18. The Menu System Keyword values
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19. Bernese Processing Engine (BPE)
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20. Processing Examples inspect the
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20. Processing Examples 20.3.1 How
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20. Processing Examples • (option
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20. Processing Examples PID 111 PRE
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20. Processing Examples 20.4.1.5 Ta
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20. Processing Examples appears in
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20. Processing Examples PID 313 MPR
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20. Processing Examples Further rea
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20. Processing Examples # # Create
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20. Processing Examples PID 101 GPS
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20. Processing Examples The RINEX n
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20. Processing Examples # # Preproc
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20. Processing Examples the loop, d
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20. Processing Examples PID 903 CLK
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20. Processing Examples and IGS 00B
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20. Processing Examples • Save th
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20. Processing Examples PID 321 GPS
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20. Processing Examples PID 301 CLK
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21. Program Structure $C / %C% PGM
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21. Program Structure (program GPSE
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21. Program Structure continued fro
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21. Program Structure continued fro
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21. Program Structure ! -----------
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22. Data Structure "Program" Area $
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22. Data Structure Table 22.1: List
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22. Data Structure 22.4.2 Geodetic
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22. Data Structure 22.4.4 Antenna P
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Page 484 AIUB ANTENNA PHASE CENTER
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22. Data Structure 22.4.5 Satellite
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22. Data Structure 22.4.6 Satellite
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22. Data Structure DIFFERENCE OF GP
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22. Data Structure 22.4.9 Subdaily
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22. Data Structure EGM96 EGM96, VER
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22. Data Structure SINEX : OPTION I
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22. Data Structure 22.4.16 Panel Up
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22. Data Structure 22.6.2 Header an
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22. Data Structure 15 Antenna type(
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22. Data Structure SVN-NUMBER= 2 ME
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22. Data Structure -1 2 1 5 TITLE :
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22. Data Structure Used by: ORBGEN
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22. Data Structure 53064.00 53065.0
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22. Data Structure CODE’S MONTHLY
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22. Data Structure Table 22.4: Stat
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22. Data Structure (3) TYPE 003: HA
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22. Data Structure 22.8.4 Station P
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22. Data Structure Remarks: • Eac
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22. Data Structure The following st
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22. Data Structure Table 22.7: List
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22. Data Structure AJAC $$ FES2004
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22. Data Structure Station sigma fi
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22. Data Structure GOPE 11502M002 Z
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22. Data Structure 22.8.18 Receiver
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22. Data Structure CODE RAPID 3-DAY
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22. Data Structure 22.9.3 Meteo and
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22. Data Structure IONOSPHERE MODEL
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22. Data Structure 22.10 Miscellane
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22. Data Structure 22.10.4 Variance
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22. Data Structure 22.10.5 Normal E
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22. Data Structure 22.10.7 Observat
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22. Data Structure Created by: Each
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22. Data Structure ----------------
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22. Data Structure 22.10.17 BPE log
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23. Installation Guide 23.1.2 Conte
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23. Installation Guide 23.1.3.2 Ins
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23. Installation Guide BERN50 : $C
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23. Installation Guide If you have
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23. Installation Guide To make the
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23. Installation Guide List of Inst
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23. Installation Guide 23.2.4 Confi
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23. Installation Guide Configure me
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23. Installation Guide ${P}/EXAMPLE
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23. Installation Guide To recompile
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23. Installation Guide Page 574 AIU
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24. The Step from Version 4.2 to Ve
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BIBLIOGRAPHY Bock, H. (2004), Effic
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BIBLIOGRAPHY Janes, H. W., R. B. La
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BIBLIOGRAPHY Schaer, S. (1998), COD
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BIBLIOGRAPHY Page 588 AIUB
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INDEX OF PROGRAMS NEQ2ASC, 207, 541
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Index of Program Panels CODSPP 2: I
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Index of Program Panels MKCLUS 3: R
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INDEX OF KEYWORDS Antenna verificat
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INDEX OF KEYWORDS Cluster definitio
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INDEX OF KEYWORDS variance-covarian
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INDEX OF KEYWORDS orbit products, 1
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INDEX OF KEYWORDS Multi-session sol
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INDEX OF KEYWORDS Orbital elements
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INDEX OF KEYWORDS Receiver antenna
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INDEX OF KEYWORDS orbit modeling, 9
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INDEX OF KEYWORDS WGS-84, 19, 88, 2
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