Global Positioning System Reference
In-Depth Information
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
TABLE 1.1
GPS Development and Performance at a Glance
1978
Launch of first GPS satellite
1982
Prototype Macrometer testing at M.I.T.
Geodetic network densification (Eifel, Germany)
President Reagan offers GPS to the world “free of charge”
Geodetic network densification (Montgomery County, Pennsylvania)
1983
1984
Engineering survey at Stanford
Remondi's dissertation
Precise geoid undulation differences for Eifel network
Codeless dual band observations
1985
Kinematic GPS surveying
Antenna swap for ambiguity initialization
First international symposium on precise positioning with GPS
[4],
Challenger
accident (January 28)
10 cm aircraft positioning
1986
Lin
—
5.3
——
Nor
PgE
1987
JPL baseline repeatability tests to 0.2-0.04 ppm
Launch of first Block II satellite
OTF solution
Wide area differential GPS (WADGPS) concepts
U.S. Coast Guard GPS Information Center (GPSIC)
1989
1990
GEOID90 for NAD83 datum
NGS ephemeris service
GIG 91 experiment (January 22-February 13)
[4],
1991
IGS campaign (June 21-September 23)
Initial solutions to deal with antispoofing (AS)
Narrow correlator spacing C/A-code receiver
Attitude determination system
1992
Real-time kinematic GPS
ACSM ad hoc committee on accuracy standards
Orange County GIS/cadastral densification
Initial operational capability (IOC) on December 8
1-2 ppb baseline repeatability
LAMBDA
1993
IGS service beginning January 1
Antispoofing implementation (January 31)
RTCM recommendations on differential GPS (Version 2.1)
National Spatial Reference System Committee (NGS)
Multiple (single-frequency) receiver experiments for OTF
Proposal to monitor the earth's atmosphere with GPS (occultations)
1994
Full operational capability (FOC) on July 17
Precise point positioning (PPP) at JPL
1995
