Document title: Readme.doc for NDADS DE UA_ASCII datatype
Project: DE
NDADS Datatype: UA_ASCII         
Super-EID: DOCUMENT                      
There may be other documents also identified by this super-EID.
NDADS filename: UA_READ_ME_DE.DOC
TRF entry b46570.txt in NSSDC's controlled digital document library. Feb. 1998.
Document text follows:
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                 DE-2 Unified Abstract data on NDADS
                 ___________________________________

The Dynamics Explorer 2 (DE-2) Unified Abstract (UA) ASCII files contain
data at 16 second time resolution from the following DE-2 experiments:
Neutral Atmospheric Composition Spectrometer (NACS), Wind and Temperature
Spectrometer (WATS), Fabry-Perot Interferometer (FPI), Retarding Potential
Analyzer (RPA), and the Langmuir Probes (LANG).  The DE-2 UA ASCII files
also contain the DE-2 orbit parameters for each data point.   

The UA daily files are requested with the DATA_TYPE = UA_ASCII and the
ENTRY_ID = yyddd and are then staged/stored as yyddd_UA_DE_16S_V01.ASC
files; yy is the year and ddd the day of the year.  The date range for
the UA files is 81218-83047 with most days represented. 

A DOCUMENT request will stage the following documents: a listing of 
parameter availability for each day (UA_CATALOG_DE.DOC), a listing
of all data and documentation files that constitute this data set
including the block size of each file (UA_FILES_DE.DOC), and this
file (UA_READ_ME_DE.DOC).

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                Format of yyddd_UA_DE_16S_V01.ASC Files
----------------------------------------------------------------------

The files are written in ASCII with each record containing the data for
one 16 second interval.  Each record contains the following data: 

                       date                         yyddd
                       time                         ms
                       orbit number
                       altitude                     km
                       latitude                     deg
                       longitude                    deg
                       local solar time             hr
                       local magnetic time          hr
                       L Shell
                       invariant latitude           deg
                       solar zenith angle           deg
1       NACS N2        density                      cm-3
2       NACS O         density                      cm-3
3       NACS HE	       density                      cm-3
4       NACS AR	       density                      cm-3
5       NACS N         density                      cm-3
6       WATS TN	       neutral temperature          K
7       WATS NVE       eastward neutral wind        m/s
8       WATS NVU       upward neutral wind          m/s
9       LANG NP	       plasma density               cm-3
10      LANG TE	       electron temperature         K
11      FPI  FWAV      wavelength                   Angstrom
12      FPI  FALT      tangent altitude             km
13      FPI  FVN       northward neutral wind       m/s
14      FPI  FTEM      neutral temperature          K
15      FPI  RAY       intensity                    Raleighs
16      RPA  TI        ion temperature              K
17      RPA  NI        total ion density            cm-3
18      RPA  IVE       eastward ion drift           m/s
19      RPA  IVN       northward ion drift          m/s
20      RPA  IVU       upward ion drift             m/s

The numbers in the first column are code numbers for the data found in
the file UA_CATALOG_DE.DOC, which contains a list of days and geophysical
data available on that day.