Abstract:
The dataset contains satellite L* values, last closed drift shell (LCDS) model locations and model magnetic field values for three two day periods covering three different magnetic storms. The periods covered are 27-28 February 2014, 22-23 June 2015 and 14-15 December 2015. The L* values are calculated for electrons with a pitch angle of 90 degrees at the locations of the GOES-13, GOES-15 and HIMAWARI-8 geostationary satellites, using the IRBEM library with the TS05 and TS07 external magnetic field models. Magnetic field values from the models are also included for the GOES-13 satellite during the June 2015 event. LCDS values for each of the periods are included, with two LCDS models based on the TS05 and TS07 field models, and a third LCDS model based particle tracing simulations.
This material is based upon work supported by the Air Force Office of Scientific Research under award number FA9550-19-1-7039. Richard Horne and Sarah Glauert were supported by the Natural Environment Research Council (NERC) Highlight Topic Grant NE/P01738X/1 (Rad-Sat) and NERC grant NE/V00249X/1 (Sat-Risk) and National and Public Good activity grant NE/R016445/1. Giulio Del Zanna acknowledges support from STFC (UK) via the consolidated grant to the astrophysics group at DAMTP, University of Cambridge (ST/T000481/1).
Keywords:
GOES, HIMAWARI, L*, LCDS, Magnetic field models, Magnetopause, Magnetopause crossings
Daggitt, T. (2022). TS05 and TS07 external magnetic field model L*, LCDS and B field data for the GOES-13, GOES-15 and HIMAWARI-8 satellites for three geomagnetic storm periods (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/346ce427-6663-45e6-b706-285bb79e41ce
| Access Constraints: | None |
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| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
| Creation Date: | 2022-07-29 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Thomas A Daggitt |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Prof Richard Horne |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Sarah Glauert |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Giulio Del Zanna |
| Role(s) | Investigator |
| Organisation | University of Cambridge |
| Name | Mervyn Freeman |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Variations in Observations of Geosynchronous Magnetopause and Last Closed Drift Shell Crossings with Magnetic Local Time, Daggitt et al. (in publishing process) | |
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| Quality: | NaN values in the L* data represent times when IRBEM was unable to determine an L* value at the satellite location. NaN values in the LCDS data represent times when the binary search for the highest L* failed to converge within 20 steps. | |
| Lineage/Methodology: | The L* and magnetic field values from the TS05 and TS07 models were calculated using the spacepy distribution of IRBEM, accessed via https://github.com/spacepy/spacepy. The calculations were performed using the IGRF internal field model, and a resolution setting of 6. The GOES satellite locations were taken from NOAA at https://www.ngdc.noaa.gov/stp/satellite/goes/index.html. Data from the Himawari-8 satellite were provided by the NICT HIMAWARI/SEDA database at https://aer-nc-web.nict.go.jp/himawari-seda/. The LCDS values were calculated using IRBEM with the same settings as the L* values, and were determined by finding via binary search the highest altitude along the Geocentric Solar Magnetospheric (GSM) x axis at which a valid L* could be calculated for a 90 degree particle at the magnetic equator. |
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| Temporal Coverage: | |
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| Start Date | 2015-06-22 |
| End Date | 2015-06-23 |
| Start Date | 2014-02-27 |
| End Date | 2014-02-28 |
| Start Date | 2015-12-14 |
| End Date | 2015-12-15 |
| Location: | |
| Location | Magnetopause |
| Detailed Location | N/A |
| Data Collection: | All LCDS, L* and magnetic field values were calculated using the spacepy distribution of IRBEM, version 0.3.0, accessed via https://github.com/spacepy/spacepy. |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 1.1 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | 5 x TXT files, totalling 1.1 MB |