Time series of the ionospheric Total Electron Content (TEC) derived for GRACE 1 and 2 satellites
Thematic areas: Space Weather, Ionosphere/Magnetosphere
Applicable missions: GRACE
Applicable spacecraft: GRACE-A, GRACE-B
Integrated electron density along the line of sight from GRACE 1 and 2 to GNSS satellites
N/A
(delivered separately)
| Variable Name | Type | Dim | Unit | Description |
|---|---|---|---|---|
| Timestamp | CDF_EPOCH | 1 | ms | Time of observation, UTC |
| Latitude | CDF_DOUBLE | 1 | deg | GRACE position in ITRF – Geocentric latitude |
| Longitude | CDF_DOUBLE | 1 | deg | GRACE position in ITRF – Geocentric longitude |
| Radius | CDF_DOUBLE | 1 | m | GRACE position in ITRF – Geocentric radius (from the Earth centre) |
| GPS_Position | CDF_DOUBLE | 3 | m | X-, Y-, Z-coordinates of the GPS satellite |
| LEO_Position | CDF_DOUBLE | 3 | m | X-, Y-, Z-coordinates of the GRACE satellite |
| PRN | CDF_UINT2 | 1 | - | Pseudorandom noise (PRN) code of GPS satellite |
| L1 | CDF_DOUBLE | 1 | m | GPS L1C (LA in RINEX v.2.20) carrier phase observation |
| L2 | CDF_DOUBLE | 1 | m | GPS L2W (L2 in RINEX v.2.20) carrier phase observation |
| P1 | CDF_DOUBLE | 1 | m | GPS C1W (P1 in RINEX v.2.20) code phase observation |
| P2 | CDF_DOUBLE | 1 | m | GPS C2W (P2 in RINEX v.2.20) code phase observation |
| S1_C_N0 | CDF_DOUBLE | 1 | dB-Hz | GPS S1 carrier-to-noise density C/N0 [AD-4] (Sect. 3.1.2.2) |
| S2_C_N0 | CDF_DOUBLE | 1 | dB-Hz | GPS S2 carrier-to-noise density C/N0 [AD-4] (Sect. 3.1.2.2) |
| Absolute_STEC | CDF_DOUBLE | 1 | TECU | Absolute slant TEC |
| Absolute_VTEC | CDF_DOUBLE | 1 | TECU | Absolute vertical TEC |
| Elevation_Angle | CDF_DOUBLE | 1 | deg | Elevation angle |
| Relative_STEC | CDF_DOUBLE | 1 | TECU | Relative slant TEC |
| Relative_STEC_RMS | CDF_DOUBLE | 1 | TECU | Root mean square of relative slant TEC2 |
| DCB | CDF_DOUBLE | 1 | TECU | GPS receiver differential code bias (DCB3) (P2–P1) |
| DCB_Error | CDF_DOUBLE | 1 | TECU | Post fit RMS of the least square system using pairs of mapped slant TEC |
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