Jökull - 01.12.1972, Page 36

Fig. 5. Thermal areas, glacier
features, and melt-water out-
flow from Kverkfjöll, inter-
preted from infrared image of
2357 IMT, 22 August 1966,
(Fig. 4). Areas of anomalously
high infrared emission shown
in black; cool feature on sur-
tace of glacier shown in gray;
arrowheads indicate direction
of melt-water drainage.
Mynd. 5. Túlknn á mnrauðri
mynd (frá 22. ágúst 1966) af
Kverkfjallasvœðinu (sbr. Mynd
4). Svceði með sterkri hi.taút-
geislun eru svört. Örvar sýna
stefnu frárennslis.
Therrnal equilibriurn point
Dyngjujökull
Jökullon
Approximate
scale
Skarphé-
dinsjökull
The secondary airborne instrument ernploy-
ed in the 28 August 1968 surveys was a KC-IB
cartographic camera. The KC-IB camera, of
particular interest because of its use with Ekta-
chrorne Infrared Aerographic film (sensitive to
visible and near infrared radiation in the 5500
to 9500 Á band) has a 153 mm focal length
t and a 73°44" field of view. 229 X229 mrn
positive film transparencies at a scale of ap-
34 JÖKULL 22. ÁR
proximately 1:20,4001) were obtained over
Kverkfjöll with this camera. Black and white
photographs (Plus X Aerographic film) at a
similar scale were also obtainecl with the KC-
1B camera.
1) Assuming a ground elevation of 1620 met-
ers at Jökullón and an aircraft altitude of 4,710
meters.