This readme file is a work in progress.
Magnetospheric Multiscale Mission (MMS):
Brief description of mission and
instrumentation:
Include in brief
description the 4 spacecraft, their instruments, formation flying, launched
March 13, 2015, status ongoing, and list of mission PHASES and their times.
Data Directory:
https://cdaweb.gsfc.nasa.gov/pub/data/mms/
This file points
to the on-line archived datasets for MMS:
Dataset directories:
Link to list of cdaweb directories and DOI’s for each dataset.
Documents:
https://cdaweb.gsfc.nasa.gov/pub/data/mms/documents
Note: documents
will be updated as made available.
Notes on connecting the dots: In
the CMAD documentation it is not always clear where to find the files or information,
this is the purpose of these notes.
Internal
Photoelectron Model for the FPI DES (electron)
measurements:
Model
Files: https://cdaweb.gsfc.nasa.gov/pub/data/mms/models/fpi/
For either the DES
mms1_fpi_brst_l2_des-moms or mms1_fpi_fast_l2_des-moms
cdf’s, similar for all 4 spacecraft.
The model to use
for a given time interval is given by the CDF attributes.
PHOTOELECTRON_MODEL_FILENAMES
and
its scaling factor by the attribute
PHOTOELECTRON_MODEL_SCALING_FACTOR
For example, for in
the file: mms1_fpi_brst_l2_des-moms_20161225155844_v3.4.1.cdf
Which covers the
burst mode time interval: 2016-12-25T15:58:44.027Z
to 2016-12-25T16:00:13.997Z the attribute values are
PHOTOELECTRON_MODEL_FILENAMES
= 'mms_fpi_brst_l2_des-bgdist_v1.1.0_p3-5.cdf';
so in Model Files directory (https://cdaweb.gsfc.nasa.gov/pub/data/mms/models/fpi/) one needs to use the one specified for this interval.
PHOTOELECTRON_MODEL_SCALING_FACTOR =
'0.3500000'
How
apply the model to correct for internal photoelectrons is given in the CMAD
section 4.5.7.2 Correction for DES
Photoelectrons pg. G17-G18.
Additional related information and data
services:
· NASA: http://mms.gsfc.nasa.gov
· Wikipedia: https://en.wikipedia.org/wiki/Magnetospheric_Multiscale_Mission
Data contact:
Scott.A.Boardsen@nasa.gov