|HP-41 Navigation Pac?|
Message #1 Posted by Karl Schneider on 17 Aug 2002, 5:11 p.m.
The Navigation Pac ROM for the HP-41 is apparently rare. The only offerings I've seen are an eBay auction a few months ago (dusty 41CX + wand + Nav Pac won for $169 -- wish I'd bid more aggressively!); and one MoHPC member had one for sale in classifieds.
I'd like to write a program for the 42S with the following data interface:
Inputs: date, time, latitiude, and longitude
Outputs: zenith angle, azimuth angle, rise time, set time for both sun and moon
I believe that the Nav Pac might offer some helpful code and ideas, but I don't know what it includes. My MoHPC CD-ROM set conatins neither a scan of that particular Pac (one of the very few that are missing), nor a code listing of the ROM.
One user program for the 42S in the MoHPC library calculates phases-of-the-moon and lists an astronomical reference.
Could anyone provide a Table of Contents listing for the Navigation Pac ROM, or give any other helpful info? Many thanks in advance...