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BIRD-DOG.ZIP
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README.DOC
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1991-09-13
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A new program has been written to update the ground station information
stored in the nest.dat file. This file normally only needs to be updated
when first installed and when local time changes twice a year. In the
past, this file was changed using a standard text editor. This was a
somewhat clumsy way to make the changes, and I have finally taken the
time to write the subroutine to prompt you for the appropriate the info
from within Bird-Dog. The Station Update is activated by pressing F8
while Bird-Dog is running. The program will prompt you for the following
informaton:
Location: a character string up to 25 characters long
Latitude: this is in decimal degrees (eg, Ann Arbor is
42.17 deg N). Note that north of the equator
is positive, south is negative.
Longitude: also in decimal degrees. West is negative,
east is positive.
Elevation: Meters above mean sea level of your ground station.
This is not critical, so approximate if not known.
Time Zone: Hours from GMT of your ground station. This is the
parameter that will change occasionally, when we
go on/off of daylight savings time. In the
Eastern time zone, this value is 5 hours during
standard time, 4 hours during daylight savings
time. Note that if you live west of the prime
meridian, this value will be positive, and
likewise negative if you live to the east of it.
One other minor change to Bird-Dog is the addition of the program that
updates the ephemeris data downloaded from bulletin boards into a file
that bird-dog can read. This function, activated by pressing F9 while
running Bird-Dog, will look for two specific files. The first, is the
bird_lst.dat file. This file contains a list of satellites from which
to extract elements for in the larger file that was downloaded. The
other file, is the one that was actually downloaded. Bird-Dog expects
this file to be called KEP.LOG. If you download the keplerian element
file under any other name, you must rename it and place it in the bird-
dog directory. Note that this function F9, supercedes the program
KEP2BD that was released with the previous versions of Bird-Dog.
13-SEP-91
Minor updates. 1) clean up mouse coordinate readout. Now updates
only when mouse is moved. 2) Bird-Dog is now exitted by pressing
the END key instead of ESC. This was changed because it was too
easy to exit the program unintentionally.
Enjoy..... Thomas C. Leadholm