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Vinje, T. E.

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Produced by the NASA Center for Aerospace Information (CASI) 
https://ntrs.nasa.gov/search.jsp?R=19760024524 2020-03-22T13:04:56+00:00Z
ally
SEA ICE STUDIES Ill f.W, SKTSMMGE-1` - GRI; 'MAID AREA
Investi.Estion "o 28 540
4th Ouarterly Progress "eport
	 RECEIVED BY
NASA STI FAC^ITY
from 
DATE:
Torte	 '' z ' e ,:—^ DCAF N0.	 QY
I1or<iegian Foler Institute
	
PjjpCESS`0
Postbox 158
	
ta WASH► 5T1 FA IA
1330 Oslo Tuf^,navn	 [[D3 ESA  SOS 
r1
C u
.. omay
August 1976
v)pgrsorirr orCanizetior : rile 1-ie„ - a- 1' oiTiegi wan Council
for c=.e:.ia_iic ar_d Industrisl "esearch 	 T T"
^hrsres Et 98 9 CS?',O 19
I
(E76-10464)	 SEA ICE STUDIES IN THE
SPITSBERGEN, GREENLAND AREA Quarterly
p rogress Report (Norsk Polarinstitutt) 2 p
HC $3.50	 CSCL 08L
N76-31612
Unclas
G3/43 00464
Wn
r4th Quarterly I'ro[ress report
:since last QPR, I,_ay 1976, 29 scenes have been received from the
test area. Eire of these scenes are from 23, ten from 25, two from
26 and eight from 29 l.pril. The negatives were received one week
e£o and the analyzing has not started for full yet. The Bence
coverage over the short period seems, however, very pron.ising for
progress within present objectives.
Ground-truth data were collected during April by myself, and later
on during July and August my Landsat fissistant will be in the
nothernmost part of the test area.
Of special interest is correspondence between a flight on 25 April
to the easternmost J.slard Kvito; ra and the obtained Lar_dsat scene
2454-11514 of the same day. This scene was registered one hour
previous to our landing with a sma11 aircraft on the ice, and we
have therefore very interesting ground truth data for interpretation
of an imagery which nearly is free for clouds.
The ground-truth data vrhich will be used for Landsat-interpretation
are:
.'ignatures of
a) i ultiyear ice
b) one year old ice
c) salt viater soaked fast ice
d) long stripes of drift snow formed in areas with open water
e) sea ice concentrations
f) shadow of transparent cirrus clouds
g) partly snow covered landscape
Five Nimbus+RA?.]S automatic stations were during April-?-'ay placed on
ice floes and drift speed values obtained in t', o different wa.--s
con therefore be compared.
The scene 2459-11514 has given additive information as to the con-
tour of Kvitoya which according to previous .i-andsat imageries has
etc -re
an average which is 26Q. greater than what was previous believed.
,^,c YELLc;r
t


Sea ice studies in the Spitsbergen, Greenland area

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