Installation
------------

There are 2 files that must be installed on your Palm Pilot
in order to use PocketSat:

PocketSat_trial.prc (or PocketSat_reg.prc) - the PocketSat application.

Mathlib.prc - Rich Heubner's invaluable double precision math library.

A third file, sampsats.pdb, is a PocketSat input database
containing some (almost certainly out-of-date) sample
satellite orbit data. You can either install this database to
play with, or ignore it and go to the PocketSat web site
( http://www.emmgraphics.com/pilot ) to get current data.

Full documentation is available in the docs directory and at the PocketSat web site.

Release Notes
-------------
V2.2 - 29 November, 2000
    - Fixed a bug when calulating passes for periods less than 3 hours
      long overlapping either sunrise or sunset.
    - Fixed the very infrequent but fatal "Bad Category" error.

V2.1 - 11 November, 2000
    - Added GMT+13 timezone for New Zealand during Daylight Savings Time
    - Fixed the "between 0 and -1 degrees Lat or Lon" bug (again.)
    - Selected pass is now maintained even if it scrolls off the screen
    - Fixed inverted bitmaps
    - Fixed a bug that could hang "visual pass" searches at very high (or low) 
      latitudes
    - Added section to docs to describe "twilight" preference

V2.0 - 14 June, 2000

    - Added user-customizable color support including night-vision 
      preserving "red mode." The same version works with both color
      and B&W devices.
    - Merged PocketSat.prc and SGPLib.prc into a single file.
    - Now allows multiple selectable observer locations.
    - Changed Latitude and Longitude entry (now takes N/S and E/W instead of +/-)
    - Added new optimizations.
    - Removed "visibility optimizations" as a preferences choice.

V1.5 - 10 August, 1999

    - Added the ability to set alarms that go off at or near the
      beginning of a pass.
    - Added tests to make sure there is enough memory before
      performing operations that need it.
    - Progress bar now shows completed fraction of entire calculation
      instead of just one satellite.
    - If "All Passes" is selected in Preferences, pass "goodness" in
      main list just reflects maximum altitude, not visibility. This
      is for radio people.
    - Added 24:00 to time choices dialog.

V1.4 - 15 June, 1999

     - Satellites are organized into PalmOs categories.
     - You can now add to a pass list, without clearing the results of
       previous calculations.
     - Added half-hour timezones.
     - The Pass Details form can now be copied to the clipboard.
     - Added a visibility optimization to test for times when the Sun is
       "too low."
     - The Pass Details form now shows 9 points, rather than 5.
     - If no satellites are selected, the program will tell you so if you try
       to perform a calculation.
     - The Satellites database is no longer backed up during a HotSync.
       This saves a lot of time.
     - Fixed a bug that prevented you from entering a longitude or latitude
       between 0 and -1 degree (kind of a bear for people in London.)

V1.3 - 23 April, 1999
     - Fixed DB import bug which could cause a crash if extra data was
       at the end of an import database
     - Added GMT+9.5 timezone for South Australia

V1.1 - 30 March, 1999 
     - Added live elevation/azimuth display to plot.
     - Import process now rejects high-orbit satellites.
     - Added 'invert plot' option to prefs.
     - Added a "No satellites in list, use import feature..." message
       to satellites form.
     - Changed time zones from '-2' to 'GMT-2' for clarity.
     - Revamped memo import.
     - Added potentially useful error messages to both import methods.
     - Both import methods now verify data checksums.
     - 'Thru' time now gets immediately set to requested end time
       rather than waiting for calculation to complete.

V1.0 - 11 March, 1999 - Initial release