2.3.1 GPS surveyings in Mt.Fuji Project 
This Project was organized by | PASCO 
, TOPCON,DAT/EM and ASHTECH in 1991. 
  
  
N 
P01 
P02 
P18 0 J 10 15 20km 
  
  
  
Figure 2.3 Ground Control Network in the 
Mt.Fuji Project 
The purpose of this project were as follows: 
1)Initially we intended to obtain precise 
ground controls for SPOT imagery model 
orientation in the mountainous districts. 
2)Confirmation of medium range distance 
measurements for mountainous areas 
3)Checking our realtime GPS mapping system 
in car navigation mode. 
For this real time GPS mapping system,we 
combined ASHTECH RANGER receiver with 
AutoCAD using the DAT/EM 3D driver on a 
Notebook type PC. (Photo 2.8) 
  
Photo 2.8 Real time GPS mapping system 
Before this project J.Yates completed a 
successful survey expedition to 
Mt .McKinley,Alaska in 1989, where he 
measured the summit elevation using GPS. 
213 
  
Photo 2.9 GPS surveying at the summit of 
Mt.Mckinley 
Some technical Data in the Mt.Fuji Project 
are described as follows: 
Observation Period: 1991 7.14 : 7.25 
Participants: PASCO,TOPCON and DAT/EM 
Equipments: ASHTECH MXII 7 sets 
Ground controls: (Hy 3 (V). 3 
Observed points: 22 points 
Base line analysis: GPPS Software 
Network Adjustment: FILLNET Software 
Project area is shown on the figure ( ) with 
the position of Mt Fuji. 
We used ASHTECH's GPPS software for base 
line analysis for 5 sessions and confirmed 
the repeatability of distance measurements 
in the differential method. 
Figure 2.4 shows the results of 
repeatability of this project. 
  
  
  
  
zd N-S 
S10 
= 3 eme Sh ie 
0 VU 00. 3] 30 
Distance Km) 
E10 
A 
= 
   
   
  
  
0 10 20 30 40 
DistanceKm) 
  
  
0 l0 c0 30 40 
Distance(Km) 
Figure 2.4 Repeatability test in base line 
measurement