RPW Data Center
solo_L1_rpw-lfr-surv-asm
The data product solo_L1_rpw-lfr-surv-asm provides uncalibrated Averaged Spectral Matrices (ASM) in survey normal mode, computed for the three frequency ranges F0, F1, and F2 of the LFR analyser of the Solar Orbiter/RPW instrument.
DOI: https://doi.org/10.57780/ESA-3XCJD4W
Publisher: ESA
Citation: European Space Agency & Maksimovic, M. (2024). RPW, Radio and Plasma Waves instrument (Version v1.0) [Dataset]. European Space Agency. https://doi.org/10.57780/ESA-3XCJD4W
Link to the data repository
Data files are available from the Solar Orbiter Archive home page.
Copies of the files are also stored in the LIRA local data repository.
Data product overview
ASMs are produced routinely on-board with three magnetic and two electric field components corresponding to 5 × 5 electromagnetic spectral matrices. Their components are calculated as auto and cross power spectra.
Reminder : F0 = 24576 Hz, F1 = 4096 Hz, F2 = 256 Hz and F3 = 16 Hz
| Type of data | Averaged Spectral Matrices |
|---|---|
| Intensity units | None |
| Frequency range | 7 to 9984 HZ |
| Frequency number | 288 |
| Frequency step | 1 Hz (F2), 16Hz (F1) and 96 Hz (F0) |
| Frequency scale | Linear |
| Time resolution | 4 seconds |
| Data format | CDF |
| File name | solo_L1_rpw-lfr-surv-asm_[YYYYMMDD]_V[version].cdf |
| Granularity | 1 file per day |
| Expected data volume | 5 MBytes per file |
Data organization
Table below gives the name, data type, units and description of the zVariables stored in the CDF file.
In the the “TYPE” column, the expected size (i.e., number of elements along each dimension) of the zVariable for a CDF record is given between bracket (e.g., “[1]”).
Non-record-variant zVariables are indicated by a “(NRV)” additional label in the “TYPE” column.
| NAME | TYPE | UNIT | DESCRIPTION |
|---|---|---|---|
| Epoch | CDF_TIME_TT2000[1] | ns | Epoch time of the record |
| ACQUISITION_TIME | CDF_UINT4[2] | CCSDS CUC Acquisition time as returned in TM packets | |
| QUALITY_FLAG | CDF_UINT1[1] | Flag to indicate the quality of the data | |
| COMMON_BIA_STATUS_FLAG | CDF_UINT1[1] | LFR common parameters and BIAS status info relevancy flag | |
| QUALITY_BITMASK | CDF_UINT1[1] | Additional flag to add quality information | |
| SURVEY_MODE | CDF_UINT1[1] | LFR survey mode | |
| FREQ | CDF_UINT1[1] | Index to indicate the sampling frequency of the snapshot : F0, F1 or F2 in order to use only one skeleton for the 3 normal mode asm products of ICD. | |
| BIAS_MODE_MUX_SET | CDF_UINT1[1] | Copy of multiplexer setting | |
| BIAS_MODE_HV_ENABLED | CDF_UINT1[1] | Copy of enable/disable HV (+- 100V). | |
| BIAS_MODE_BIAS1_ENABLED | CDF_UINT1[1] | Copy of enable/disable BIAS 1. | |
| BIAS_MODE_BIAS2_ENABLED | CDF_UINT1[1] | Copy of enable/disable BIAS 2. | |
| BIAS_MODE_BIAS3_ENABLED | CDF_UINT1[1] | Copy of enable/disable BIAS 2. | |
| BIAS_ON_OFF | CDF_UINT1[1] | Copy of BIAS status | |
| BW | CDF_UINT1[1] | BIAS Works/BIAS Fails configuration | |
| SP0 | CDF_UINT1[1] | Shaping of electrical data | |
| SP1 | CDF_UINT1[1] | Shaping of electrical data | |
| R0 | CDF_UINT1[1] | Rooting of electrical data | |
| R1 | CDF_UINT1[1] | Rooting of electrical data | |
| R2 | CDF_UINT1[1] | Rooting of electrical data | |
| ASM_CNT | CDF_UINT1[1] | Number of matrices read for a given sampling frequency (F0, F1 or F2). | |
| ASM | CDF_REAL4 [128,25] | All the 5x5 matrices for all bins of a given sampling frequency. Number of matrices is [ASM_CNT] | |
| ACQUISITION_TIME_UNITS | CDF_CHAR[2] | Label for ACQUISITION_TIME UNIT_PTR attribute | |
| ACQUISITION_TIME_LABEL | CDF_CHAR[2] | Label for ACQUISITION_TIME | |
| SCET | CDF_REAL8[1] | Ticks | Spaceraft Elapsed Time |
| SYNCHRO_FLAG | CDF_UINT1[1] | Time synchronization flag |
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) |
|---|
Release notes
See MODS global attribute in the CDF files for an history of the data modifications.
Authors
Thomas Chust, Rodrigue Piberne, Bruno Katra, Alexis Jeandet and Véronique Bouzid (retired).
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)
• Observations of whistler mode waves by Solar Orbiter’s RPW Low Frequency Receiver (LFR): In-flight performance and first results, Chust et al, A&A, 2021, https://doi.org/10.1051/0004-6361/202140932
• NASA CDF Web portal
Return to Data products description mainpage