of GPS assisted aerophotogrammetry were 
performed in the framework of a co-operative 
project between U.S.G.S. and the Dept. of 
Survey and Land Information (New Zealand). 
On the aircraft were installed two receivers and 
were used up to 5 reference stations on ground. 
The day 326 the operations were co-ordinated 
by Terra Nova Bay Station on different Italian 
projects characterised by photo scale ranging 
from 1:20000 to 1:50000 for mapping 
purposes and 1:3000 for biological aims 
(Hothem et al., 1994). 
During the 1994-95 expedition various RES 
(Radio Echo Sounding) profiles were made with 
a GPS antenna installed on the top of a Twin- 
Otter plane. In Fig.1 is shown a trajectory of 
the vehicle obtained from a continuos kinematic 
survey. The master receiver was located at 
about 1 Km far from the starting point. The 
plane travel was made through an automatic 
data processing without any interruption and 
obtaining the required precision. In Fig. 2 is 
presented the altymetric profile of the fly 
referred to same RES survey. 
1720000 
  
1710000 
Lovin 
X 
SI 
3 
  
1690000 
3 $-8 
BBs EB 
B Er B 
1650000 
1640000 
ht ll 
1630000 
  
  
  
MIT 
470000 480000 490000 500000 510000 520000 530000 540000 
East (m) 
Fig.1- Planimetric track of airborne RES 
mission obtained by continuous kinematic GPS 
surveying. 
Considering the required precision for this 
particular experiment, it did not appear 
necessary to use more receivers on board and 
32 
more reference stations, that could permit to 
increase the control on the accuracy and 
repeatability of the survey but that introduce 
excessive costs for this purpose. The OTF 
solved automatically the phase integer 
ambiguities for the whole profile. 
1200 
  
   
© 
1 
| 
| 
1000 — iis 
q | 
[ 
A | 
800 — di 
- | 
- | 
= | 
BOF leg M : 
= 7 I 
= a | I 
2 7j I i 
2 wl... Slates 
= 
1 I 
| 
200 —- - - — — zm i 
| | 
| | 
| | 
| I 
x 7 
| 
| 
| 
ELLE Leu 
  
  
| | 
-200 
  
rT TFT erry rrr rrr TTT 
82000 83000 84000 85000 86000 87000 88000 
Time (s) 
Fig. 2- Altimetric profile relative to the 
trajectory presented in figure 1. 
3. International Trans Antarctic Scientific 
Expedition 
A continuous kinematic survey was performed 
on the vehicles partecipating at the International 
Trans Antarctic Scientific Expeditions test, 
made during the 9th expedition. The survey was 
required for navigation purposes and for 
altimetric description for the ice surface 
monitoring. The first leg covered a distance of 
about 280 km from Terra Nova Bay Station 
towards the plateau with the purpose of 
investigating the accessibility of the plateau 
from Italian Base on the basis of the foreseen 
Traverse to Dome C (1997-98). 
One of the main objectives of the Traverse 
Program is the development of a high resolution 
map in order to describe the climate change 
during the last 100-200 years on Dome C area. 
In figures 3, 4 and 5 are reported the 
comparison between the obtained solutions 
from two different reference stations. The first 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996 
one 
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cycle 
4.( 
2.( 
0. 
-2. 
Coordinate differences (m) 
-4. 
Fig.3 
obtai 
refer: 
4.( 
m) 
Coordinate differences ( 
Fig.4 
obtai 
two 1