I've done the math subtracting both skips and my clock bias's and frequency
drifts from sirf msg30 (prn30) that were posted on timenuts earlier this week;
1.3331348485e-006 3.6930953087e-012 my data
1.3294251003e-006 3.6977287551e-012 skips
.0037097482e-006 -.0046334464e-012
I better explain how to interpet my programs output.
(parser of msg 30 and 41)
My C programming (turbo C for dos) isn't so great.
My program that parses out msg 30 and has wrap around problems in a dos window.
here is the latest data.
prn clk bias freq driftdelta of delta of last
Looking at my previous post today I see that I should point out something else
in my parsing programings output
The last colume I labled a clk bias corrections is somewhat misleading.
numbers displayed x.xxxe-7 x.xxxe-8 are corrections.
numbers displayed as x.e-3 x.e-4 x.e-5 x.
tom jones wrote:
I haven't rulled out dopplar shift or my mis-understanding of how gps works
and what msg 30 really means.
Perhaps the sat is broadcasting the bias and drift every minute and the gps
receiver is dummer than I thought ?
I believe message 30 is about the local clock in the GPS
Hi Skip,
Your message 30,30 is nearly identical to mine on 3-2-14 2:00mst
I just realized I been putting my time stamps as pdt should be pst (pacific
standard time).
Anyway the supperb time rate from svn64 prn30 changed from execellant to
average. Compareable to the other sats on
2/26/2014
svn64 alive and well
Using sirfdemo pc software coupled with sirf iv gps receiver I picked up
the first signal from svn64 (now
assigned prn30).
The sat was launched from cape canavral (airforce station) florida last
thursday evening 2-20-14 about 17:55pdt.
The gps control people seem to
svn64 alive and well
Using sirfdemo pc software coupled with sirf iv gps receiver I picked up the
first signal from svn64 (now assigned prn30).
The sat was launched from cape canavral (airforce station) florida last
thursday evening 2-20-14 about 17:55pdt.
The gps control people seem to be
