On 8/31/18 11:17 AM, Hal Murray wrote:
[email protected] said:
I have somewhere a paper (which i cannot find currently, sorry) that used a
dish trained at one of the EGNOS satellites and used it as the only source
for timing. IIRC the results were promising, but not spectacular. The problem
being that all the ionospheric and tropospheric ...
There is another problem in that area. How accurately is the location of the
satellite known? published?
Geo-sync satellites actually wander around their nominal positions. How much
does that effect timing? I've seen figure-8 pictures of the pattern, but I
don't remember any data on elevation changes.
Their orbital elements are published and updated periodically - download
them off spacetrack or other sources.
Here's an example
The orbit data is extracted from the following two-line orbital elements,
1 43228U 18023A 18243.14094620 -.00000224 00000-0 00000+0 0 9995
2 43228 0.0377 58.1839 0003405 72.7364 229.1178 1.00272082 1950
Epoch (UTC): 31 August 2018 03:22:57
Eccentricity: 0.0003405
inclination: 0.0377°
perigee height: 35772 km
apogee height: 35800 km
right ascension of ascending node: 58.1839°
argument of perigee: 72.7364°
revolutions per day: 1.00272082
mean anomaly at epoch: 229.1178°
orbit number at epoch: 195
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