Abstract:
Signals from manmade VLF transmitters, used for communications with submarines, can leak into space and contribute to the dynamics of energetic electrons in the inner radiation belt and slot region. We use ~5 years of plasma wave data from the Van Allen Probe A satellite to construct new models of the observed wave power from VLF transmitters both as a function of L* and MLT and geographic location. This work is reported in Meredith et al. (2019) and the data provided here enable reconstruction of all of the figures in the paper.
Keywords:
VLF transmitters, inner radiation belt, plasma waves, slot region
Meredith, N., Horne, R., Clilverd, M., & Ross, J. (2019). Global models of the VLF transmitter wave power in the inner radiation belt and slot region (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/395408f5-0f0e-43b3-83c8-dfa719a1bb87
| Creation Date: | 2019-05-10 |
|---|---|
| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
|
| Parameters: |
|
| Personnel: | |
| Name | Dr Nigel Meredith |
| Role(s) | Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Prof Richard Horne |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | UK Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Mark A Clilverd |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Johnathan P J Ross |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Quality: | The wave data have been calibrated and quality-controlled prior to release. | |
|---|---|---|
| Lineage: | The data used in this study come from the NASA Van Allen Probe A. The wave data used in this study were downloaded from https://emfisis.physics.uiowa.edu/data/index and the magnetic ephemeris data were downloaded from https://www.rbsp-ect.lanl.gov/data_pub/rbspa/MagEphem/. The AE indices used in this study were downloaded from the NSSDC Omniweb. Full details of the subsequent analysis are given in Meredith et al. [2019]. | |
| Temporal Coverage: | |
|---|---|
| Start Date | 2012-10-26 |
| End Date | 2017-08-31 |
| Location: | |
| Location | Van Allen Radiation Belts |
| Detailed Location | Perigee of ~1.1RE; apogee of ~5.8RE; inclination of 10 degrees |
| Data Collection: | We use data from the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on board Van Allen Probe A. The wave electric field of the VLF transmitter signals is measured using the wave High Frequency Receiver (HFR). This instrument provides measurements of one component of the wave electric field in the plane perpendicular to the spin axis in 82 logarithmically spaced frequency bins in the frequency range 10 to 487 kHz every 6 s. For comparison with published wave magnetic field intensities and for use in diffusion calculations we also convert the wave electric field to the wave magnetic field. This requires knowledge of the electron gyrofrequency and the electron plasma frequency. The former is determined directly from the 1s fluxgate magnetometer measurements of the local magnetic field. The electron plasma frequency is derived from the HFR data and provided as a Level 4 data product. The data were subsequently analysed and processed as described in Meredith et al. [2019]. |
|---|
| Data Storage: | There are 8 ASCII text files - one for each figure. The format of each file is described at the top of each file. |
|---|