Below is an overview of the three programs for the density derivation and associated analysis for determining the input parameters and testing. The codes are available as zip file (klick the title of the progam below) and works in an environment where spedas is running. Data sets not available from spedas are also included in the zip file.
- This is a refined version of the previous software, mmsedptest, started in ASAP11 for the correlation of potential different parameters, calculation of photo curves, spin tone correction and E-field correction. It calculates a refined density product, but only from data from a few days (maximum weeks) at a time due to the large memory requirement.
- This program needs to call the software, SPEDAS, in order to retrieve MMS data (available online).
- Outputs are either plots or ASCII tables.
- The program can be configured in such a way that ASCII tables of spin mean values are generated, which can be further processed by the second program, corrVandFlux.
- Input data in the Zip file contains, e.g. ASPOC and EDI operations data, but MMS data, i.e., Slow Survey, Fast Survey, or Burst data are expected to be retrieved with SPEDAS load procedure.
- Input: Spin-average data generated by mmsedpana
- This code can process data within 1 November 2015 and 1 September 2019 (covering the nominal mission and the first two years of the extended mission) and is useful for finding the optimized scheme for deriving the density product by analyzing the data from entire mission at a time.
- The code performs correlations with Solar Activity Indices, generates orbit plots, and generates ASCII files with reconstructed density.
- Input data in the Zip file contains the solar indices and the files with the spin averaged values generated by mmsedpana.
- Similar to corrVandFlux, but input files are created by corrVandFlux with reconstructed density.
- Plots the reconstructed density together with the measured values for validating the results.
- The Zip file contains the solar indices and the files with the spin-averaged values generated by corrVandFlux with the reconstructed density.
Preliminary data product
Below are eight preliminary data files (separately for ASPOC ON and OFF conditions and for each spacecraft) with measured and reconstructed electron densities for the time frame 2015-11-01 to 2019-09-01. The files contain spin averages of spacecraft potential, electric field, measured electron density and temperature, electron current derived from the latter quantities, and reconstructed electron density using electron temperatures measured by FPI when available as well as assumed temperatures of 10, 100, and 1000 eV. The data for ASPOC OFF have been calculated using 3-potential range Maxwellian fits. The data for ASPOC ON were derived from fitting a single Maxwellian function to the data. Since it has been found that data from radial distances below 15 RE exhibit larger scatter and potentially some artefacts which are not yet accounted for, the photocurves have been derived from data outside 15 RE.