2020/08/09 Updates to CDF L1 data structure
Due to Solar Orbiter metadata standard, some updates of L1 CDF files data structure were necessary.
Epoch
Epoch is now computed using spice kernel, from SCET coarse and fine time
Other time variables
Other time variables are now represented as CDF_REAL8, giving number of seconds of oncloard clock.
-
Replace SCET_coarse_time (CDF_UINT4) + SCET_fine_time (CDF_UINT2)
with a single variable : SCET (CDF_REAL8)
-
Replace CCSDS_coarse_time (CDF_UINT4) + CCSDS_fine_time (CDF_UINT2)
with a single variable CCSDS_time (CDF_REAL8)
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These modifications have been applied to all CDF L1 files
|
CDF L1 3D matrix description
In order to have the same description of PAS 3D distribution data in both L1 and L2 CDF files, we have decided to rename some support data variables in CDF L1 3D files.
-
Energy_table ⇒ Energy
-
Energy_delta_plus ⇒ delta_p_Energy
-
Energy_delta_minus ⇒ delta_m_Energy
-
CEM_table ⇒ Azimuth
-
CEM_delta ⇒ delta_Azimuth
-
Elevation_table ⇒ Elevation
-
Elevation_delta ⇒ delta_Elevation
L1 3D CDF files
Logical file ID
solo_L1_swa-pas-3d_yyyymmdd_Vxx.cdfNew CDF 3D data structure
| Varname | Size and Type | Vary | Description |
|---|---|---|---|
Epoch |
CDF_TIME_TT2000 |
Yes |
Epoch encoded as Terrestrial Time on rotating Earth geoid, ns since J2000 |
Duration |
CDF_FLOAT |
Yes |
Acquisition duration |
CCSDS_time |
CDF_REAL8 |
Yes |
Elapsed time of the onboard clock at the time of data recording on SSMM |
SCET |
CDF_REAL8 |
Yes |
Elapsed time on the onbloard clock at the start of acquisition time |
SOURCE |
CDF_UINT1 |
Yes |
Source (0: Normal, 1: Snapshot, 2: Burst, 3: Trigger |
SAMPLE |
CDF_INT2 |
Yes |
Current sample |
NB_SAMPLE |
CDF_INT2 |
Yes |
Number of samples |
FIRST_ENERGY |
CDF_INT2 |
Yes |
First energy bin |
NB_ENERGY |
CDF_INT2 |
Yes |
Number energy bins |
FIRST_ELEVATION |
CDF_INT2 |
Yes |
First elevation bin |
NB_ELEVATION |
CDF_INT2 |
Yes |
Number elevation bins |
FIRST_CEM |
CDF_INT2 |
Yes |
First CEM |
NB_CEM |
CDF_INT2 |
Yes |
Number CEM |
INFO |
CDF_UINT1 |
Yes |
Info |
SCHEME |
CDF_UINT1 |
Yes |
Scheme |
FULL_3D |
CDF_UINT1 |
Yes |
Full 3D |
COMPRESSED |
CDF_UINT1 |
Yes |
Compressed data |
MAX_CNT_ENERGY |
CDF_INT2 |
Yes |
Max count energy bin |
MAX_CNT_ELEVATION |
CDF_INT2 |
Yes |
Max count elevation number |
MAX_CNT_CEM |
CDF_INT2 |
Yes |
Max count CEM |
NB_K |
CDF_INT2 |
Yes |
Number of sub-samping per second |
K |
CDF_INT2 |
Yes |
Current sub-sampling |
COUNTS |
11 x 9 x 96 x CDF_UINT2 |
Yes |
3D counts |
Energy |
96 x CDF_REAL4 |
No |
Center of energy bins |
delta_p_Energy |
96 x CDF_REAL4 |
No |
Energy bins delta plus values |
delta_m_Energy |
96 x CDF_REAL4 |
No |
Energy bins delta minus values |
Azimuth |
11 x CDF_REAL4 |
No |
Center of Azimuth bins (CEM) |
delta_Azimuth |
11 x CDF_REAL4 |
No |
Azimuth bins half interval |
Elevation |
9 x CDF_REAL4 |
No |
Center of elevation bins |
delta_Elevation |
9 x CDF_REAL4 |
No |
Elevation bins half interval |
Previous CDF 3D data structure
| Varname | Size and Type | Vary | Description |
|---|---|---|---|
Epoch |
CDF_TIME_TT2000 |
Yes |
Epoch encoded as Terrestrial Time on rotating Earth geoid, ns since J2000 |
Duration |
CDF_FLOAT |
Yes |
Acquisition duration |
CCSDS_coarse_time |
CDF_UINT4 |
Yes |
CCSDS coarse time |
CCSDS_fine_time |
CDF_UINT2 |
Yes |
CCSDS fine time |
SCET_coarse_time |
CDF_UINT4 |
Yes |
SCET coarse time |
SCET_fine_time |
CDF_UINT2 |
Yes |
SCET fine time |
SOURCE |
CDF_UINT1 |
Yes |
Source (0: Normal, 1: Snapshot, 2: Burst, 3: Trigger |
SAMPLE |
CDF_INT2 |
Yes |
Current sample |
NB_SAMPLE |
CDF_INT2 |
Yes |
Number of samples |
FIRST_ENERGY |
CDF_INT2 |
Yes |
First energy bin |
NB_ENERGY |
CDF_INT2 |
Yes |
Number energy bins |
FIRST_ELEVATION |
CDF_INT2 |
Yes |
First elevation bin |
NB_ELEVATION |
CDF_INT2 |
Yes |
Number elevation bins |
FIRST_CEM |
CDF_INT2 |
Yes |
First CEM |
NB_CEM |
CDF_INT2 |
Yes |
Number CEM |
INFO |
CDF_UINT1 |
Yes |
Info |
SCHEME |
CDF_UINT1 |
Yes |
Scheme |
FULL_3D |
CDF_UINT1 |
Yes |
Full 3D |
COMPRESSED |
CDF_UINT1 |
Yes |
Compressed data |
MAX_CNT_ENERGY |
CDF_INT2 |
Yes |
Max count energy bin |
MAX_CNT_ELEVATION |
CDF_INT2 |
Yes |
Max count elevation number |
MAX_CNT_CEM |
CDF_INT2 |
Yes |
Max count CEM |
NB_K |
CDF_INT2 |
Yes |
Number of sub-samping per second |
K |
CDF_INT2 |
Yes |
Current sub-sampling |
COUNTS |
11 x 9 x 96 x CDF_UINT2 |
Yes |
3D counts |
Energy_table |
96 x CDF_REAL4 |
No |
Cenetr of energy bins |
Energy_delta_plus |
96 x CDF_REAL4 |
No |
Energy bins delta plus values |
Energy_delta_minus |
96 x CDF_REAL4 |
No |
Energy bins delta minus values |
CEM_table |
11 x CDF_REAL4 |
No |
Center of CEM bins |
CEM_delta |
11 x CDF_REAL4 |
No |
CEM bin half interval |
Elevation_table |
9 x CDF_REAL4 |
No |
Center of elevation bins |
Elevation_delta |
9 x CDF_REAL4 |
No |
Elevation bin half interval |
L2 3D CDF files
Logical file ID
solo_L1_swa-pas-3d-fdist_yyyymmdd_Vxx.cdfCDF structure
| Variable | Sizes x type | Vary | Catdesc |
|---|---|---|---|
Epoch |
CDF_TIME_TT2000 |
Yes |
Epoch encoded as Terrestrial Time on rotating Earth geoid, ns since J2000 |
Half_interval |
CDF_REAL4 |
Yes |
Acquisition period half interval |
SCET |
CDF_REAL8 |
Yes |
Elapsed time on the onboard clock |
start_energy |
CDF_INT2 |
Yes |
Start energy bin |
nb_energy |
CDF_INT2 |
Yes |
Number energy bins |
start_elevation |
CDF_INT2 |
Yes |
Start elevation bin |
nb_elevation |
CDF_INT2 |
Yes |
Number elevation bins |
start_CEM |
CDF_INT2 |
Yes |
Start CEM |
nb_CEM |
CDF_INT2 |
Yes |
Number CEM |
nb_K |
CDF_INT2 |
Yes |
Number of sub-samping per second |
K |
CDF_INT2 |
Yes |
Current sub-sampling |
fdist |
11 x 9 x 96 x CDF_REAL4 |
Yes |
Distribution function |
Energy |
96 x CDF_REAL4 |
No |
Center of energy bins |
delta_p_Energy |
96 x CDF_REAL4 |
No |
Delta plus energy bins |
delta_m_Energy |
96 x CDF_REAL4 |
No |
Delta minus energy bins |
Azimuth |
11 x CDF_REAL4 |
No |
Center of CEM bins (azimuth) |
Elevation |
9 x CDF_REAL4 |
No |
Center of elevation bins |
delta_Azimuth |
11 x CDF_REAL4 |
No |
Delta Atimuth (CEM) |
delta_Elevation |
9 x CDF_REAL4 |
No |
Delta elevation table |
FULL_EN_TABLE |
11 x 9 x 96 x CDF_REAL4 |
No |
Full definition energy table |
FULL_AZ_TABLE |
11 x 9 x 96 x CDF_REAL4 |
No |
Full definition azimuth table |
FULL_EL_TABLE |
11 x 9 x 96 x CDF_REAL4 |
No |
Full definition elevation table |
