Mission Planning bird numbers?
Posted By STEPHEN PICKFORD on 11/24/2000 at 8:11 AM

I noticed that there are now 9 Glonass sats operating, but the SV numbers on the Glonass site are 2,3,4,6,6,7,8,9,11 but the Ashtech Mission Planning (alm.00325) shows 1,7,8,10,11,13,15,17,22.

Do these numbers match, or am I barking up the wrong tree?
How do I work out what GPS day it is?


Re: Mission Planning bird numbers?
Posted By Bob LeMoine on 11/24/2000 at 5:44 PM

Stephen,

Ashtech GPS/Glonass receivers display the Glonass SV numbers in the following format:

US NAVSTAR GPS Satellites use PRN Numbers 1-32
These SV Numbers relate to the NAVSTAR GOLD Codes.

On Ashtech GPS/Glonass receivers, any SV's numbers higher
than 33 are GLONASS Satellites. Example: if the GG24 receiver
is tracking SV 52, simply subtract 32 from 52 = GLONASS SV 20.

GPS Days follow the Julian Day Format.
Jan 1st = Julian Day 001, etc.
Nov. 24 = Julian Day 329
Many Calenders show the Gregorian Day & the Julian Day.

You can also Download a GPS Calender Program from the NGS
Web Site: http://www.ngs.noaa.gov
Browse over to PC Programs.

Bob LeMoine
Ashtech Precision Products



Re: Mission Planning bird numbers? At last!
Posted By STEPHEN PICKFORD on 11/24/2000 at 9:16 PM

Thanks a million Bob, at last soemone has cleared up the mystery of the bird numbers.
cheers.