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Brown, G. S.

Miller, L. S.

English

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E7.3 1 O9,1 7
"MIde evailabfe under NI'S/ 'rwO R E3
In the interest of early an. ' ",
semination of Earth Resources Survey
Program information and without liability
for any use made thereof." 14 August 1973
NASA Lyndon B. Johnson Space Center
Earth Observations Division
Attn: Mr. Zack H. Byrns, Mail Code TF6
Houston, Texas 77058
, .
Subject: Contract NAS9-13304 Monthly Progress Report for the Period
l ~ of 1 July - 31 July, 1973.
z General
X Efforts this period have been devoted to obtaining "quick-look" data
} from SL-2, planning for SL-3 and continuing with the development of mathe-
matical models for processing of S-193 radar altimeter data.
l 3 Problem Areas
O L·lo 930 c No significant problem areas were encountered this period.
I 1 4 -U
l H Investigation Results
l) D a
o 4 vAn analysis of ten (10) seconds of Mode I altitude data from EREP Pass
o four resulted in a standard deviation of about 7.5 nanoseconds for the
z altimeter output. This standard deviation of the altitude data translates
into approximately 12 nanoseconds jitter in the tracker loop which compares
H4J
(ec7%o favorably with GE's breadboard test results. The 12 nanosecond jitter standard
o sO deviation indicates that realignment of the Sample and Hold gates will not be
necessary when determining the mean return pulse. A "quick-look" at the mean
e- return pulse shape from EREP pass four, Mode I indicates an antenna pointing
~  I angle of 0.5 to 0.7 degrees off nadir.
lo , ^ Initial data processing algorithims were passed to NASA-Wallops Station
W,*- personnel for computer programming.
e 4,
.. Next Period Efforts
We will continue to reduce the available "quick-look" data in order to
determine their impact on processing models we are currently developing.
Major efforts which remain are waveform reconstruction and a determination.
https://ntrs.nasa.gov/search.jsp?R=19730020534 2020-03-22T22:56:05+00:00Z
Travel Summary and Plans
On 17-19 July, Dr. Brown traveled to Houston (NASA-JSC) to obtain
"quick-look" data from SL-2. On 25-27 July, Dr. Brown traveled to Wallops
Island (NASA-WS) to coordinate data processing efforts and to participate
in the S-193 planning for SL-3.
No trips are scheduled for the next period.
Financial Management Report
A financial report for this period is included as Appendix A.
Lee S. iller, Ph.D.
Principal Investigator
LSM/dc


Acquisition of quick-look data from SL-2

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