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SWENET Software Infrastructure Space Weather Data Specification ...

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2.4.2 Historical Dst Values<br />

Table Name tb_ngdc_dst<br />

<strong>Data</strong> File ftp.ngdc.noaa.gov\STP\GEOMAGNETIC_DATA\INDICES\DST<br />

Project: <strong>Space</strong> <strong>Weather</strong> Pilot Project Coordination and <strong>Software</strong> <strong>Infrastructure</strong> Development<br />

Reference: R047rep026_00_07_<strong>Data</strong>_<strong>Specification</strong>_(BIRA).doc<br />

eta_max space GmbH, Richard-Wagner-Str. 1, 38106 Braunschweig, Germany<br />

<strong>SWENET</strong> <strong>Software</strong> <strong>Infrastructure</strong> Date: 2004-10-20<br />

<strong>Space</strong> <strong>Weather</strong> <strong>Data</strong> <strong>Specification</strong> Version: 0.<br />

External data resources Status: Draft<br />

Comments Dst (Disturbance Storm Time) equivalent equatorial magnetic disturbance indices are derived from hourly scalings of low-latitude horizontal<br />

magnetic variation. They show the effect of the globally symmetrical westward flowing high altitude equatorial ring current, which causes<br />

the "main phase" depression worldwide in the H-component field during large magnetic storms.<br />

Column/Index <strong>Data</strong> Type Modifiers Description Check<br />

id serial key<br />

utc timestamp key UTC date and time<br />

geomag_fieldcomp varchar(1) Geomagnetic Field Component H,D,Z,X,Y, or *=index,<br />

p=preliminary<br />

base_value smallint Tabular or Base Value (100 nT units for H,Z,X,Y and degrees<br />

for D)<br />

dst_01 smallint Value for hour 1 of day<br />

H,Z,X,Y in units of 1 nT; D in units of 0.1 min<br />

dst_02 smallint Value for hour 2 of day<br />

H,Z,X,Y in units of 1 nT; D in units of 0.1 min<br />

dst_03 smallint Value for hour 3 of day<br />

H,Z,X,Y in units of 1 nT; D in units of 0.1 min<br />

dst_04 smallint Value for hour 4 of day<br />

H,Z,X,Y in units of 1 nT; D in units of 0.1 min<br />

dst_05 smallint Value for hour 5 of day<br />

H,Z,X,Y in units of 1 nT; D in units of 0.1 min<br />

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