The solo_L2_rpw-tds-surv-mamp data provide Maximum Absolute Amplitudes from TDS measurements, sampled in survey normal and burst. This special product contains the maxima of an absolute value of the raw observed signals in each channel, sample at the original 2097.1 kHz frequency. The maxima are taken over 16384 samples (equivalent to 7.8 milliseconds) or a multiple of this interval. This yields a time series of up to 128 points per second per channel. This product is always enabled in BURST mode and sometimes in NORMAL mode when telemetry is available

DOI: https://doi.org/10.57780/esa-3xcjd4w

Data organization

Each CDF record in the file contains values for up to three channels of the electric field, as indicated in CHANNEL_ON. The calibrated absolute values of the electric field data (V/m) in sensor coordinates are stored in WAVEFORM_DATA variable. The calibration is done by a constant, frequency independent factor for each antenna, corresponding to instrument gain at approximately 50 kHz. Each component of the time series corresponds to measurement from a single antenna (either monopole or differential, depending on input configuration). The individual components are thus not orthogonal.

The Epoch time (CDF_TIME_TT2000) of each record represents the acquisition time of the first data sample in the selection time interval.

The WAVEFORM_DATA variable contains in general multiple signal components from individual antennas, each component represented by one component of the vector. The valid channels are indicated by a non-zero value in the corresponding element of CHANNEL_ON variable and the dipole/monopole antenna configuration for each channel can be found in CHANNEL_REF variable in numeric form or in CHANNEL_LABEL in text form. In a vast majority of cases, only the three standard configurations listed in Table 1 are used but sometimes only the first two components are stored.

Missing or invalid data samples are represented using FILLVAL.

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.

Release notes

See MODS global attribute in the CDF files for an history of the data modifications.

Authors

David Pisa, and Jan Soucek.

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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