RPW Data Center
solo_L2_rpw-lfr-surv-swf-e
solo_L2_rpw-lfr-surv-swf-e contains snapshot waveform for single-ended probe potentials and differential probe potentials. Only contains data which has been routed through LFR. Additionally contains bias currents.
The format of this data product is identical to that of solo-L2_lfr-surv-cwf-e except for the dimensions of zVariables VDC, EDC, and EAC which here contain one more dimension in order to store one snapshot per CDF record and channel instead of just one sample per CDF record and channel.
DOI: https://doi.org/10.57780/esa-3xcjd4w
| Type of data | Single-ended probe potential, differential probe voltage; bias current |
|---|---|
| Units | V, nA |
| Sampling rate | 256-24576 Hz |
| Samples per snapshot | 2048 |
| Data format | CDF (3.9.0) |
| Granularity | 1 file per day |
Data organization
See table below for relevant zVariables stored in the CDF file. Each CDF record contains one snapshot.
| NAME | TYPE | UNIT | DESCRIPTION |
|---|---|---|---|
| Epoch | CDF_TIME_TT2000 [1] | ns | Epoch time of the record. |
| BW | CDF_UINT1 | BIAS Works/BIAS Fails configuration. | |
| QUALITY_FLAG | CDF_UINT1 | Numerical flag in the range 0-4 to indicate the quality of the data. Higher is better. | |
| QUALITY_BITMASK | CDF_UINT2 | Quality bitmask to indicate various quality-related conditions specific for L1 processing. The values are inherited from the parent data products. | |
| L2_QUALITY_BITMASK | CDF_UINT2 | Quality bitmask to indicate various quality-related conditions specific for L2 processing. The L3 data products inherit the values from the parent L2 data products. | |
| DELTA_PLUS_MINUS | CDF_INT8 | ns | Half the sample integration time. Half the bin size for downsampled data. |
| VDC | CDF_FLOAT | V | Calibrated single antenna signals, antennas 1-3. The dimensionality depends on whether the data product contains continuous waveform or snapshots. |
| EDC | CDF_FLOAT | V | Calibrated differential antenna signals (three). The dimensionality depends on whether the data product contains continuous waveform or snapshots. |
| EAC | CDF_FLOAT | V | Calibrated differential antenna signals (three), high-pass filtered with roll-on at 50 Hz. The dimensionality depends on whether the data product contains continuous waveform or snapshots. |
| IBIAS1 | CDF_FLOAT | nA | Calibrated bias current on antenna 1. |
| IBIAS2 | CDF_FLOAT | nA | Calibrated bias current on antenna 2. |
| IBIAS3 | CDF_FLOAT | nA | Calibrated bias current on antenna 3. |
| SAMPLING_RATE | CDF_FLOAT | Hz | Sampling rate. For snapshots, this refers to the sampling rate of samples within the snapshots. |
| SYNCHRO_FLAG | CDF_UINT1 | Flag to indicate if the local time is synchronized with the RPW DPU clock or not. Possible values: synchronized=0, not synchronized=1. |
Rules of use
Please read the text of the Rules_of_use global attribute in the CDF files.
See also in https://rpw-datacenter.obspm.fr/spip.php?article4.
Caveats and known issues
Table below gives the list of main known issues and the actions taken to mitigate them.
Please read the CAVEATS global attribute entries in the CDF files to be aware of the possible issues and limitations concerning data.
| ISSUE | MITIGATION(S) |
|---|---|
| RPW MY (3) electrical antenna signal was lost intermittently between November 13th and March 15th. Corresponding BIAS data were impacted. | None yet. Data products for the affected time interval are not yet available. Future data products will have a specific entry added for the global attribute CAVEATS and zVariable QUALITY_FLAG zVariable capped at 1 for impacted records. |
| Cases of saturation of signals, mostly rare except for the period Dec 2022 to Feb 2023 | zVariable L2_QUALITY_BITMASK contains information on the presence of saturated data. zVariable QUALITY_FLAG capped at 0 (full saturation) or 1 (partial saturation). |
| Thruster firings sometimes affect the data. | zVariable QUALITY_FLAG capped at 1. |
Release notes
See MODS global attribute in the CDF files for an history of the data modifications.
Authors
References
• The Solar Orbiter Radio and Plasma Waves (RPW) instrument, Maksimovic et al., A&A, 2020 (https://doi.org/10.1051/0004-6361/201936214)
• Metadata Definition for Solar Orbiter Science Data, Helen R. Middleton
• RPW Data Product Description Document (DPDD)
• NASA CDF Web portal
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