"Made available under NASA sponsorship
in the interest of early and wide dim- '"' 
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'semination of Earth Resources Survey 
E 7.3 
1 0 6. 2. 6
Program information and without liability
for any use made thereof." 
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- -J" 
'1111 STEWART 
AVI-NUE
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-' 
" BETHPAGI:E. NEW YCIRK 11714-
GEC73L-433
5 June 1973
National Aeronautics and Space Administration
Goddard Space Flight Center
Greenbelt, Maryland 20771
Subject: NASA Contract NAS5-21811, Virgin Islands ERTS-1 Experiment #589,
PRO 45, Type I Progress Report for the period April and May 1973
Gentlemen:
During the period of April and May 1973 we resolved software problems
with GSFC which enabled us to process the precision CCT tapes. In addition
GSFC supplied a bulk computer print out of the island of St. Thomas, MSS
Bands 4, 5, 6 and 7. 
Precision digital data print outs for each of the
harbor test stations in the 4 MSS bands indicated that considerable radio-
metric data had been lost when compared with the bulk data. Consequently
we reviewed very carefully the bulk data print outs in an effort to use
these data for correlation with-the ground stations in order to benefit.
from the greater radiometric fidelity and still locate t'ach computer print
out character on a map with acceptable accuracy. A simple grid system
which enables scaling the computer print out to the USC&GS chart was
developed.
Progress during April and May is summarized below:
1. 
Processed both precision and bulk CCT tapes in the Grumman
LM Data Reduction Station.
2. Developed a simple means which will enable correlation of
bulk data with in-situ data for each of the test stations.
3. 
Partially reduced optical measurements of test panels and
harbor water.
4. Received from our Co-Principal Investigator, Marine Resources
Development Foundation (Dr. D. Olsen) rough draft summary
report of the harbor water quality in-situ measurements.
Subsdiearies: 
* PURITECH INDUSTRIES. INC. * SCIENTIFIC ECOLOGY. INC. * POWER-PAC ENTERPRISES.INC.
Oivi!o JE73-10626) 
VIRGIN ISLANDS ERTS-1
i EXPERIMENT NO. 589 Proqress Report, 
N73-24386
Apr. - May 1973 (Grumman Ecosystems
I Corp., Bethpaqe, N.Y.) 
2 p HC $3.00 
Unclas
CSCL 08F G3/13 00626
l
GEC73L-433
GRUMMAN 
PAGE 
2
5 June 1973
5. 
Plotted tidal current data for October 17th (Satellite pass).
6. 
Correlation of ERTS data with in-situ water quality data appears
obvious on a qualitative basis. During the next reporting period
we should have some results on quantitative correlation.
Yours truly,
GRUMMAN ECOSYSTEMS CORPORATION
W. C. Coulbourn
Applied Technology
WCC: jl
cc: 
R. D. Phillips, NASA Goddard Space Flight Center
E. F. Szajna, NASA Goddard Space Flight Center
ERTS Project Scientist
R. Withrow, ERTS Scientific Monitor
NASA Scientific and Technical Information Center
J. H. Boeckel, NASA Goddard Space Flight Center (2 copies)
-A;,
* 
I..