<https://spdf.gsfc.nasa.gov/pub/data/de/de1/magnetic_fields_maga/>
#<ftp://nssdcftp.gsfc.nasa.gov/spacecraft_data/de/de1/magnetic_fileds_maga/00readme.txt>

Dynamics Explorer-1 (DE 1) Magnetometer Instrument A (MAGA) Data

This directory gathers data for the MAGA instrument that flew on the DE 1 
spacecraft. DE-1 was launched on 3 August 1981 into an elliptical orbit with 
an altitude range of 570 km to 23 000 km (3.63 Earth radii) and ceased operations 
in January 1991. 

/gms_62ms_vmsbin   (NSSDC ID: 81-070A-01B)

This high-resolution data set consists of triaxial fluxgate measurements taken 
every 62.5 msec (16 vectors/second). The instruments digital resolution ranged 
from 0.02 nT to 1.5 nT. The MAG-A data set consists the three components of the 
measured magnetic field and of the model magnetic field (MAGSAT) in Geomagnetic 
Spherical (GMS) Coordinates. The data are provided as daily files in VMS fixed-
length binary format (yyyyddd_de1_maga_gms_62ms.vmsbin) from Sep 15, 1981 to 
Feb 18, 1991.

/gms_6s_ascii	  (NSSDC ID: 81-070A-01C)

These 6-second averages are provided in ASCII format containing the model (MAGSAT) 
magnetic field components in Geographic (GEO) Spherical Coordinate and the 
difference field in local magnetic coordinates and in Geomagnetic Spherical (GMS) 
coordinates. This data set was generated by T. Iyemori at the University of Kyoto, 
Japan.

The following links provide access to data set documentation and software:
These files are now in <https://spdf.gsfc.nasa.gov/pub/data/de/de1/magnetic_fields_maga/documents/>
(1) SFDU description of the MAGA instrument and data
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b46598.txt
(2) A description of the SFDU data format
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b48485.txt
(3) IDL program to read data into arrays 
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b48488.pro
(4) IDL program to read data and average 
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b48489.pro
(5) Read data (IDL) requires CONV_VAX_UNIX.PRO 
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b48487.pro
(6) IDL subroutine for VAX to UNIX conversion 
	https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b48486.pro
(7) Description of the DE-1 magnetic field (MAG-A) 6-second average resolution data set
        https://spdf.gsfc.nasa.gov/pub/documents/old/miscellaneous_documents_from_nssdc/b46599.txt


/6sec_magagms_cdaweb/  Conversion to CDF from /gms_6s_ascii/

/62ms_magagms_cdaweb/  Conversion to CDF from /gms_62ms_vmsbin/
Data from these files had errors preventing conversion:
1982226_de1_maga_gms_62ms.vmsbin
1983216_de1_maga_gms_62ms.vmsbin
1983365_de1_maga_gms_62ms.vmsbin
1984068_de1_maga_gms_62ms.vmsbin
1985010_de1_maga_gms_62ms.vmsbin
1986006_de1_maga_gms_62ms.vmsbin
1988081_de1_maga_gms_62ms.vmsbin


Related Links:
NSSDC Master Catalog <http://nssdc.gsfc.nasa.gov/nmc/sc-query.html>

SPDF/NSSDC Contact: <mailto:gsfc-spdf-support@lists.nasa.gov> for more information. 
Also <mailto: Dieter.Bilitza@nasa.gov>, 1-301-286-0190
and <mailto:Robert.M.Candey@nasa.gov>, 1-301-286-6707

Please acknowledge NASA's Space Physics Facility, National Space Science Data Center and the 
Principal Investigator for data usage.

Keywords: Sun-Earth Connections, space physics, magnetosphere, ionosphere

#NASA Official: Dr. Robert E. McGuire, Head, SPDF <mailto:Robert.E.McGuire@nasa.gov>
NASA Official: Robert.M.Candey@nasa.gov, Head, SPDF