European Space Agency, Swarm PDGS, 2013, "SW_STRxATT_1B", European Space Agency, https://doi.org/10.57780/esa-cc563ac
| Variable | Units | Description | Dim | Type |
|---|---|---|---|---|
| Timestamp | - | Time stamp | 1 | CDF_EPOCH |
| SyncStatus | - | Synchronization status | 1 | CDF_UINT2 |
| q | - | Quaternion, transformation: ITRF <- S/C | 4 | CDF_DOUBLE |
| Flags_q | - | Flags characterizing the attitude information, | 1 | CDF_UINT1 |
| Maneuver_Id | - | Current maneuver identification code | 1 | CDF_UINT1 |
| Flag | Value | Description |
|---|---|---|
| Flags_q | 0 | Attitude information (STR) nominal |
| 1 | Lack of 1 or 2 attitudes of CHU1 in 4 nearest STR samples | |
| 2 | Lack of 1 or 2 attitudes of CHU2 in 4 nearest STR samples | |
| 3 | Lack of 1 or 2 attitudes of CHU3 in 4 nearest STR samples | |
| 4 | Lack of 3 or 4 attitudes of CHU1 in 4 nearest STR samples | |
| 5 | Lack of 3 or 4 attitudes of CHU2 in 4 nearest STR samples | |
| 6 | Lack of 3 or 4 attitudes of CHU3 in 4 nearest STR samples | |
| 7 | Not currently used | |
| 8 | On-ground aberrational correction of any attitude sample among 4 nearest STR samples. | |
| 9-14 | As 1-7 above with on-ground aberrational correction of any attitude sample among 4 nearest STR samples. | |
| 15 | Not currently used | |
| 16 | CHU1 obscured by bright object in 4 nearest STR samples (all 4 CHU1 samples invalid), CHU2 and CHU3 ok | |
| 17 | CHU2 obscured by bright object in 4 nearest STR samples (all 4 CHU2 samples invalid) , CHU1 and CHU3 ok | |
| 18 | CHU3 obscured by bright object in 4 nearest STR samples (all 4 CHU3 samples invalid) , CHU1 and CHU2 ok | |
| 19 | Lack of 2-4 attitudes of CHU1 and CHU2 in 4 nearest STR samples, but not both simultaneously | |
| 20 | Lack of 2-4 attitudes of CHU1 and CHU3 in 4 nearest STR samples, but not both simultaneously | |
| 21 | Lack of 2-4 attitudes of CHU2 and CHU3 in 4 nearest STR samples, but not both simultaneously | |
| 22 | Lack of 3-4 attitudes of CHU1, CHU2, and CHU3 in 4 nearest STR samples, but not two simultaneously | |
| 23 | Not currently used | |
| 24-30 | As 16-22 above with on-ground aberrational correction. | |
| 31 | Not currently used | |
| 32 | 1 or 2 attitudes based on CHU1 alone (CHU2 and CHU3 missing) in 4 nearest STR samples | |
| 33 | 1 or 2 attitudes based on CHU2 alone in 4 nearest STR samples | |
| 34 | 1 or 2 attitudes based on CHU3 alone in 4 nearest STR samples | |
| 35 | 2 attitudes based on single, intermittent CHU alone in 4 nearest STR samples | |
| 36-39 | Not currently used | |
| 40-43 | As 32-35 above with on-ground aberrational correction. | |
| 44-47 | Not currently used | |
| 48 | 1 attitude sample missing among 4 nearest STR samples (data gap) | |
| 49 | 2 attitude samples missing among 4 nearest STR samples | |
| 50 | 3 or more attitude samples missing among 4 nearest STR samples | |
| 51 | 3 or 4 attitudes based on CHU1 alone in 4 nearest STR samples | |
| 52 | 3 or 4 attitudes based on CHU2 alone in 4 nearest STR samples | |
| 53 | 3 or 4 attitudes based on CHU3 alone in 4 nearest STR samples | |
| 54 | 3 or 4 attitudes based on single, intermittent CHU alone in 4 nearest STR samples | |
| 55 | Not currently used | |
| 56-62 | As 48-54 above with on-ground aberrational correction. | |
| 63-254 | Not currently used | |
| 255 | Not enough STR data for generating attitude information. |
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