About the validation and verification of the RPW data productsquality.
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RPW L1 QUALITY_BITMASK CDF VARIABLE
Definition
The formal definition of the QUALITY_BITMASK CDF zVariable is provided in the "Metadata Definition for Solar Orbiter Science Data" document (SOL-SGS-TN-0009). There is one value per CDF record.
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Bit | Decimal value | Meaning | Justification | Computation | Comment |
RPW +Z ANT PA in the line of sight of the HGA during TX ON. | The HGA TX may have an impact on the RPW science measurement quality when the ANT PA in the HGA light of sight | To be determinated by ROC from SPICE computation | |||
SPICE Heat Shield Door is open | SPICE HSD may have an impact on the RPW +Z ANT bending effect | Known from HSD_SPICE_OPEN E-FECS event | |||
LFR setting has changed before the end of the current data samples acquisition | According to LFR data acquisition mechanism and CDF structure, it can be impossible for some dataset (i.e., SWF) to take of a LFR setting change - performed via a command execution on-board - in a CDF record time window. Users need nevertheless to be warned when such LFR setting change occurred during a data sample acquisition. | Known from the reception of the TM_LFR_TC_EXE_SUCCESS {YIW00139} S1 TM that confirms the LFR setting change | |||
Possible SWA-PAS high voltage contamination | SWA-PAS unit may provoke noise on RPW measurements | Inclusion of this event into the bitmask is TBC (quantification of the impact is TBD) | |||
EMC QUIET window | SolO payload is in EMC QUIET mode | Known from EMC_MAND_QUIET E-FECS event | |||
EMC NOISY window | SolO payload is in EMC QUIET mode | Known from EMC_PREF_NOISY E-FECS event | |||
Spacecraft roll manœuvre | Indicate when the spacecraft perform rolls | Known from *_ROLL E-FECS event | |||
Thruster firings | Indicate when the plateform thruster firings happen | Known from TMC+WOL E-FECS event | |||
BIAS1_SWEEP - ongoing sweep | Ongoing sweep on one probe. | Should be set from 100 ms before the sweep to 1 s after the sweep on a particular probe. | |||
BIAS2_SWEEP - ongoing sweep | |||||
BIAS3_SWEEP - ongoing sweep | |||||
BIAS1_CURRENT_NONCONSTANT | Changes in biasing current may (1) not be instantaneous, and (2) may have uncertain timestamps. | Should be set from 100 ms before to 1 s after any change in bias current on a particular probe (including sweeps). | |||
BIAS2_CURRENT_NONCONSTANT | |||||
BIAS3_CURRENT_NONCONSTANT |
Implementation
The QUALITY_BITMASK values of the RPW L1 CDF will be set by the RPW operations and data pipeline (RODP) hosted at LESIA.
RPW L1R/L2 QUALITY_FLAG CDF VARIABLE
Definition
The formal definition of the QUALITY_FLAG CDF zVariable is provided in the "Metadata Definition for Solar Orbiter Science Data" document (SOL-SGS-TN-0009). There is one value per CDF record.
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Quality | Meaning |
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0 | Bad data |
1 | Known problems, use at your own risk |
2 | Survey data, possibly not publication-quality |
3 | Good for publication, subject to PI approval |
4 | Excellent data which has received special treatment |
Implementation
The QUALITY_FLAG values of the RPW L1 CDF will be all set to "3" by default.
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Warning |
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The RCS cannot increase the value of a given QUALITY_FLAG record. Especially, the higher QUALITY_FLAG index (i.e. "4") is not used for L1/L1R/L2 CDF. For instance, if a given input RPW L1R CDF has a QUALITY_FLAG record value equals to "2", then the corresponding value in the output L2 CDF can be "2", "1" or "0" depending on the RCS QUALITY_FLAG computation. In another word, "bad quality" data records cannot become "good quality" data records along the L1 to L2 data processing path. |
Computation
The detailed computation of the QUALITY_FLAG for each RPW data product is given in the RCS Software Requirements Specification (SRS) documents (see RPW Calibration Software Documentation).
DOCUMENTATION
- The RPW science Data Validation and Verification Plan (DVVP) is available in https://confluence-lesia.obspm.fr/download/attachments/3113240/ROC-GEN-SCI-PLN-00077-LES_Iss01_Rev00%28RPW_DVVP%29.draft-2019011.pdf?version=1&modificationDate=1549625875889&api=v2
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