Re: The NOG - AFSPC Media Telecon for IIR-20M (svn 49, prn 01) problem



"HIPAR" <captchas@xxxxxxxxxxx> schrieb im Newsbeitrag news:ec109541-6677-4238-be61-70a4829faf0c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
About a week ago, the Air Force stopped including PRN01 in the daily
constellation performance report. I 'spot checked' their report for
several weeks before this happened finding the reported PRN01
satellite error was consistently less than a meter. I don't know how
they calculate the error. It must be some kind of daily average but
one would hope the hour to hour error wouldn't fluctuate wildly from
the reported number.

The Air Force is proud to state the overall constellation satellite
error continuously improves and now is under a meter. It was
outperforming PRN30 which is in a nearly identical obit. Of course,
if PRN01 reverses that trend, I'd turn it off and designate the
satellite as as a spare for emergency reactivation. Otherwise, If the
'fix' doesn't cause problems for the phase tracking users, I'd have no
problem setting PRN01 healthy.

What's wrong .. the world wants to know. Although the Air Force
operates within a 'cult of secrecy', ITAR or not they are going to
feel pressure to explain this debacle; especially after that GAO
report questioning their competency to sustain the system.
Practically speaking, they lost absolute control when the system was
opened for civilian use with the demands of other entities
complicating their operations. I'm thinking they would be happier
just providing the military signals not having to worry about a hodge-
podge of civilian signals and interoperability/compatibility with
everyone else building competing 'superior' systems.

--- CHAS

Read the article I wrote on the SVN 49 issue. It is out on Inside GNSS now. It nicely explains what is being done and why that works (for "ordinary" users).

http://www.insidegnss.com/node/1574

My blog: http://gnss.servolux.nl/gnss_blog.html

Tim

.

Relevant Pages

  • Re: The NOG - AFSPC Media Telecon for IIR-20M (svn 49, prn 01) problem
    ... the Air Force stopped including PRN01 in the daily ... constellation performance report. ...
    (sci.geo.satellite-nav)
  • Spysats: win some, lose some
    ... By Michael Fabey/ Aerospace Daily & Defense Report ... Commercial satellite imaging company GeoEye is on schedule to meet the ... GeoEye vice president of communications and marketing. ...
    (sci.space.policy)
  • not display report header when fields are empty
    ... I have a report which uses three levels of grouping. ... Satellite: Tethys ... Planet: Mercury ... Star System: otherstarsystem ...
    (microsoft.public.access.reports)
  • Re: not display report header when fields are empty
    ... The record source of the report is actually a query which joins the values ... Satellite: Tethys ... Planet: Mercury ... Star System: otherstarsystem ...
    (microsoft.public.access.reports)
  • USA 193
    ... From, Jonathan's Space Report, Jan 21 ... The NRO's experimental USA 193 surveillance satellite, ... reported to be crippled soon after its launch on a Delta II in Dec ...
    (sci.space.policy)