Iode changeover coverage for GPS signals

Details Iode changeover coverage for GPS signals Iode changeover coverage for GPS signals

1996-12-23

1998-03-24

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

3644499, G04B 7185, G01S 502

Patent

active

057317879

ABSTRACT:
A method for compensating for temporary loss of differential GPS correction signals for a satellite, numbered j, during an IODE changeover interval. Differences .DELTA.e.sub.i (t;j;n+1,n)=e.sub.i (t;j;n+1)-e.sub.i (t;j;n) (i=1, . . . , I) are formed for I ephemeris parameters used to describe the ephemeris for the satellite (j) during IODE intervals number n+1 and n. These differences are approximated for a DGPS blank-out time interval, given by t(j;n+1).sub.IODE .DELTA.t.sub.rev,mob .ltoreq.t<t(j;n+1).sub.IODE +.DELTA.t.sub.ch +.DELTA.t.sub.rev,ref, during which a GPS reference station continues to broadcast DGPS correction information based on the old ephemeris data that was valid during the preceding IODE time interval, given by t(j;n).sub.IODE .ltoreq.t<t(j;n+1).sub.IODE. These ephemeris differences are used by a mobile station that receives DGPS correction information from the GPS reference station to produce corrected GPS information for a blank-out time interval. Ephemeris parameter differences can be replaced by differences of satellite-station ranges .DELTA.R(t;j;n+1,n)=R(t;j;n+1)-R(t;j;n) in an alternative approach.

REFERENCES:
patent: 5323322 (1994-06-01), Mueller et al.
patent: 5398034 (1995-03-01), Spilker, Jr.
patent: 5477458 (1995-12-01), Loomis

Affiliated with

Also associated with

Rating

Iode changeover coverage for GPS signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Iode changeover coverage for GPS signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iode changeover coverage for GPS signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2292328