LLOCAL10.EXE      MA and Time Calculations  

This group of files was designed to insure accuracy in various amateur
satellite calculations.  They are not necessary for successful operation,
but they can enhance most operations on Oscar 13.

All of these calculations can be done easily on a hand calculator.  The
programs were written for the computer to increase accuracy, not speed.

If you find them of some value, enjoy, and if you are not an AMSAT 
member please consider joining.  Their address for infomation:

                       AMSAT
                       P. O. Box 27
                       Washington, D. C. 20044

The programs take into account timing errors in the satellite's
computer.  They are satisfactory for short term predictions. (Practice has
shown several months accuracy).  An ongoing program of time calculations  
should increase this accuracy for long term predictions.  Stay tuned.
The satellite clock was corrected by one minute in April of 1991, and
these programs reflect that correction.

The source code is NOT available.  This has nothing to do with proprietary
rights.  I don't want to be embarassed by my "spaghetti" code.

Recommendations for improvement are solicited.  I can be reached on any of 
the birds, the 20 meter AMSAT net, 14.282 on Sundays or by phone. WB6BDY
has a good BBS at (619) 279-3921.  I can also be reached there.

      BBS address is    DAVE GUIMONT

                                 73,
                                      Dave  WB6LLO, San Diego, CA
PROGRAMS:

SATCALCS.TXT----This file.

ADDHOURS.EXE----Entry is hours, minutes, and seconds.  Adds them.

SUBHOURS.EXE----Entry is hours, minutes, and seconds.  Subtracts them.

DECHMS.EXE------Converts decimal hours to hours, minutes and seconds.

HMSDEC.EXE------Converts hours, minutes and seconds to decimal hours.

MACALC.EXE------Converts Keplarian factor "Orbits per day" to 
                minutes/phase angle(MA count).  It then calculates total
                time for an operating period based on MA units.
		  
ORBITNO.EXE-----Used to determine the orbit number.  Entry is the date and 
                an observed event time.  This can be from any up to date 
                program, or for increased accuracy an actual observed
                event.  Round off to nearest orbit number, and confirm with
                an event prediction. 		

NOTE:   PHASE.DAT or MAPALS.DAT MUST ACCOMPANY SOME VERSIONS		 
  
	Send an SASE for information on the "NO DITTERS".

	MATCH any receive frequency in the passband with your
	transmit frequency INSTANTLY.  Send an SASE to:

			Dave Guimont, Jr. WB6LLO
			5030 July St.
			San Diego, CA  92110
                           
				for a FREE brochure.