This directory contains orbits 1-2500 of the PVO Electron Temperature
Probe (OETP) ionopause location dataset. This dataset contains the parameters
associated with the location of both inbound and outbound crossings, whenever
they can be determined. For many orbits only one of the crossings (or neither)
can be identified. A complete description of the dataset is contained in the
file DATASET.TXT.


Useful Files:
DATASET.TXT (describes the dataset)
../INST.TXT (describes the OETP instrument)

The data are provided in a single ASCII table (IONOPAUS.TAB).
The data file has a detached PDS label file (.LBL) which describes some of
the physical properties of the data.  There is a single format file (.FMT) which
describes the columns of the data files.


Columns in all data files:
=====================================================
name      type       units       description
-----------------------------------------------------
orbit     integer    N/A         PVO orbit number
peridate  integer    N/A         PVO periapsis date YYDOY
peritime  char       N/A         Periapsis time HH:MM:SS
in_secs   integer    second      Inbound crossing second-of-day
in_time   char       N/A         Inbound crossing time HH:MM:SS
in_lat    float      degree      Inbound crossing latitude
in_lst    float      hour        Inbound crossing local solar time
in_alt    float      km          Inbound crossing altitude
in_sza    float      degree      Inbound crossing solar zenith angle
out_secs  integer    second      Outbound crossing second-of-day
out_time  char       N/A         Outbound crossing time HH:MM:SS
out_lat   float      degree      Outbound crossing latitude
out_lst   float      hour        Outbound crossing local solar time
out_alt   float      km          Outbound crossing altitude
out_sza   float      degree      Outbound crossing solar zenith angle

Any data column whose value is 0 is a missing data value.

Data Files (.TAB extension)
===============================================================================
Name     Records  Cols  Len  Start                     Stop
-------------------------------------------------------------------------------
IONOPAUS 1079     15    116   1978-12-05T15:07:34.817Z  1985-07-22T22:46:18.000Z

Catalog data which includes instrument, dataset, and data parameter
descriptions are located at:

/CATALOG/CATALOG.CAT