About the verification of the RPW data quality.
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RPW
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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.
For RPW L1 CDF
Table below gives the list of possible values extracted from the rpw_dataset_bitmask_definition_v01.xlsx (in progress). The information provided by this variable will be used by the RPW Calibration Software (RCS) to define the QUALITY_FLAG values (see below)for L1 CDFs. It assumes that this values are common to all RPW L1 CDF products (TBC).
The QUALITY_BITMASK values of the RPW L1 CDFs are set by the RPW operations and data pipeline (RODP) hosted at LESIA.
| 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 |
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| SCM out of working temperature | Indicate when the SCM temperature are out of working range | known from HK_LFR_TEMP_SCM T< -55°C or T> +85°C | |||
| EMC Transients ? | indicate EMC transient: - SCM heater on/off - autre ..? | - Known from HK_PDU_HEATER_CURRENT - autre .. ? | |||
| SCM calibration on | Indicate when the LFR send calibvration signal to SCM | known from HK_LFR_CALIB_ENABLED |
For RPW L2 CDF
Table below gives the list of possible values for L2 CDF.
The QUALITY_BITMASK values of the RPW L1 L2 CDF will be set by the RPW operations and data pipeline (RODP) hosted at LESIA.
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Calibration Software (RCS).
Bits allocated at L1 level should be saved as is in L2 and not superseded. Free bits can be used by the RCS to provide extra information.
INSTRUCTION: Table to be filled with extra information to be passed by RCS in the L2 CDF QUALITY_BITMASK zVar using free bits. "Bit" and "Decimal value" columns should be let free for the moment. "Comment" column can be used to specify the data product(s) for which the QUALITY_BITMASK zVar must be set.
| Bit | Decimal value | Meaning | Justification | Computation | Comment |
RPW 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 |
|---|---|
| 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 plan
The QUALITY_FLAG values of the RPW L1 CDF will be are all set to "3" by default.
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The detailed computation of the QUALITY_FLAG for each RPW L1R/L2 data product is must be given in the RCS Software Requirements Specification (SRS) documents (see RPW Calibration Software Documentation).
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