Release Notes
SxP4Test/SGP4/SDP4 source code
Michael F. Henry
www.zeptomoby.com/satellites

10/16/2005 Do not use time_t type when calculating the epoch for ECI 
           coordinates. Thanks to the U.K's M. Trethewey for locating yet 
           another time_t problem.
           
           Updated class cJulian with a new constructor and "span" functions.
   
07/19/2005 Fixed error in calculating m_kmPerigeeRec, which is not used by 
           SGP4 or SDP4 calculations. Added m_kmApogeeRec and corresponding
           accessor function cOrbit.Apogee().
           
06/22/2005 MSVC++ 7.0 compiler/library change: pow(int, int) now returns 0 if
           the exponent is less than 0. Updated ExpToDecimal() to use 
           pow(double, double) instead. This was not pow() behavior in 
           MSVC++ 6.0. Thanks to Dr. Andy Register for first reporting this 
           issue.

08/29/2004 More time_t problems: A truncation error in CJulian::toTime() was
           causing time_t values to have an average error of 0.5 seconds from
           their Julian counterpart.
           
05/23/2004 Julian date class now calculates year, month, day, without using
           time_t type, which only has a resolution of 1 second. This was 
           causing errors when calculating azimuth and elevation for 
           satellites which pass near the zenith. Thanks to Markus Knapek 
           in Germany for first reporting this issue.
                               
12/07/2003 First writing.