As a parallel effort to the LACATE balloon experiment a small optical system was constructed to enable a balloon test of a diode filter system similar to the type planned for the Nimbus-G SAM II experiment. The system was called the SAM II Balloon Test. Results of the balloon flight are summarized

Pepin, T. J.

English

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https://ntrs.nasa.gov/search.jsp?R=19760011631 2020-03-22T17:17:14+00:00Z
(NASA-CF-'46281)
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FINAL REPORT
SAM II BALLOON TEST
(STRATOSPHERIC AEROSOL MEASUREMENT)
NASA CONTRACT
NSG-1006
February 1976
Theodore J. Pepin
Principal Investigator
Department of Physics and Astronomy
University of Wyoming
Laramie, Wyoming 82071
APP-4
m.	 1_	 J^
IN9'RODUCTiON
As a parallel effort to the LACNIT balloon experiment a small
optical system was constructed to enable a balloon test of a diode
filter system similar to the typo planned for the Nimbus-G SM1 II
experiment. The system was called the SMI II Balloon 'Pest. Prior
to the sunrise on the night of the LACATH Experiment, a 100,000 ft3
balloon was launched with the SAM II test instrument. When the
balloon was at an altitude of 80,000 fact it broke on ascent and
the SMI II test was terminated without collecting any data. About
a month later, tho package was found by a hiker and the SAM II
Balloon instrument was returned to the University of Wyoming.
After the first flight and the instrument's return, the gondola
was refurbished and flown again from the balloon station at Laramie.
This flight was successful, and the data was described in a paper at
the Spring 1975 meeting of the A.G.U. by the principal. investigator.
The results are summarized here.
BALLOON PLIGHT R8SUL7'S
Balloon Plight: IV-105
Date: June 7, 1975
Launch Time: 0241 CDT
Launch Location: Laramie, Wyoming
Detector: PIN 40 diode United Detector
Filter: X=l.Opm, AA=.03pm
Data Recorded: Intensity vs. time
Balloon Alt vs. time
Detector temp vs. time
Balloon Position vs. time
I 
The recorded data has been reduced. and 'fable-1 lists the
observed parametors. In this table the following I iramotors are
listed:
Time: CDT time in decimal hours
GL ANG: Elevation angle from local horizontal to solar center
I-INIT: Intensity recorded during balloon .Plight
I-CRCT: Intensity corrected for vignetting (< I%) and for temp
sensitivity of diode (1-10<)
TAN HT: Computer tangent height of ray from balloon to center of
solar disk
Airmass: Computed airmass along ray.
The corrected intensities as a function of tangent height have
been used to compute the total extinction coefficient by using an
"Onion skin" model. of the atmosphere and inverting the signal. The
aerosol extinciton coefficient, 0 A, was then determined by subtracting
the molecular extinction for a standard atmosphere. The results are
shown in Figure 1. Figure 2 shows the extinction ratio, ratio of
total extinction to molecular extinction, as a function of alcitude
for these results. The large ratios shown in Figure 2 are caused
by the aerosol from the ruego Volcano that erupted in October of 1974;
they demonstrate the ability that the solar extinction method at
X=11nm has in meaburing the stratospheric aerosols. gackscatter ratios
from LIDAR returns at this time were less than 4.0.
2
1	
o	
1111	 ^	
`	
x	
__.__ .
	 _.	 _
i
TAI11.E -1
LARA-IM PLIGHT - W-105 - 6/7/75
STATION I,ATITUUIi: 41.3136
STATION LONGITUDE: - 105.6731
TIME EL ANG I-INI'I' I-CRC11 TAN IIT AIIWASS
6.419 8.384 98.000 106.828 .000 .048
6.410 8.299 97.800 106.629 .000 .049
6.402 8.218 97.500 106.320 .000 .049
6.394 8.137 97.400 106.229 .000 .049
6.386 8.054 96.800 105.619 Ono .050
6.370 7.889 97.400 106.362 .000 .051
6.362 7.800 97.100 106.078 .000 OS1
6.353 7.722 97.100 106.123 .000 .051
6.345 7.636 97.000 106.060 .000 .052
6.287 7.050 96.000 105.277 .000 .055
6.100 5.183 95.600 1.06.143 1000 .074
6.075 4.940 96.000 106.838 1000 .077
6.067 4.859 95.900 106.813 .()On .078
6.059 4.777 96.200 107.237 1000 .079
6.051 4.698 96.600 107.769 .O00 .080
6.043 4.617 96.500 107.745 Ono .081
6.034 4.S37 961GOO 107.945 .000 .082
6.026 4.456 96.500 107.922 .000 .083
6.018 4.376 96.600 108.123 Ono .084
6.010 4.292 96.500 108.103 1Ono .086
6.001 4.212 96.700 108.41.7 .000 .087
5.993 4.128 96.800 108.626 .000 .088
5.985 4.048 96.800 108.720 Ono .090
5.977 3.968 97.600 109.714 .000 .091
5.968 3.886 96.800 108.911 .000 .093
5.960 3.804 96.800 109.008 .Ono .094
5.952 3.724 96.900 109.21,6 .000 .096
5.943 3.643 96.700 109.087 Ono .097
5.935 3.561 96.600 109.072 1000 .099
5.927 3.483 96.400 108.939 .000 .101
5.919 3.402 96.500 109.150 .000 .102
5.910 3.320 96.300 109.022 .000 .104
5.902 3.2111 96.400 109.231. .000 .106
5.894 3.159 96.300 109.216 Ono .108
5.886 3.078 96.300 1.09.328 .000 1110
5.877 2.995 96.200 109.333 .000 .112
5.869 2.916 95.90f) 109.106 .000 .114
5.861 2.838 95.700 108.990 Ono .116
5.852 2.756 95.400 108.766 .000 .118
5.844 2.676 95.500 108.995 .000 .121
5.836 2.594 95.1.00 108.657 Ono .123
5.828 2.518 95.000 108.660 .000 .126
5.572 .061 92.900 110.144 .000 .283
3
a
TAI,IX-I Continued
'1'IM1i	 I11. ANG	 1-INIT	 SCRCT	 TAN in,	 AIMMSS
5.563 -.018 92.900 110.282 32.309 .293
5.555 -.098 92.900 110.421 32.301 .304
5.547 -.178 92.700 110.324 32.280 .315
5.522 -.414 92.600 110.619 32.147 .354
5.513 -.493 92.500 110.638 32.079 .368
5.505 -.571 92.400 110.658 31.998 .383
5.497 -.648 92.300 110.668 31.908 .399
5.489 -.726 92.100 110.546 31.805 .416
5.480 -.804 92.000 110.545 31.690 All
5.472 -.882 91.800 110.425 31.563 .453
5.465 -.949 91.600 110.294 31.445 .471
5.455 -1.036 91.300 110.075 31.279 .495
5.447 -1.111 91.200 110.076 31.125 .517
5.439 -1.188 91.100 110.082 30.953 .542
5.431 -1.264 91.000 1.10.086 30.773 .568
5.423 -1.339 90.700 109.845 30.587 .595
5.415 -1.413 90.600 109.848 30.390 .624
5.407 -1.489 90.300 109.635 30.178 .656
5.383 -1.707 89.000 108.484 29.509 .760
5.367 -1.859 88.700 108.419 28.987 .847
5.317 -2.320 87.600 107.721 27.1.48 1.211
5.308 -2.401 87.200 1.07.265 26.785 1.294
5.299 -2.479 86.500 106.438 26.423 1.383
5.290 -2.561 86.000 1,05.859 26.029 1.485
5.282 -2.638 85.300 105.030 25.655 1.586
5.274 -2.715 84.700 104.325 25.262 1.700
5.265 -2.794 83.500 102.881 24.852 1.826
5.257 -2.870 82.600 101.807 24.447 1.958
5.248 -2.946 80.700 99.519 24.034 2.101
5.240 -3.019 80.100 98.831 23.630 2.252
5.232 -3.094 79.000 97.525 23.208 2.421
5.224 -3.166 77.400 95.600 22.788 2.598
5.216 -3.239 76.200 94.166 22.359 2.791.
5.208 -3.315 74.200 91.744 21.9061 3.013
5.199 -3.390 71.500 88.454 21.445 3.251
5.191 -3.467 68.000 84.170 20.968 3.521
5.183 -3.542 64.600 80.005 20,494 3.111
5.174 -3.622 59.800 74.102 19.984 4.143
5.147 -3.863 47.300 58.681 18.41.0 5.366
5.138 -3.945 44.500 55.248 17.857 5.875
5.113 -4.171 41.500 51.627 16.324 7.528
5.098 -4.301 39.200 48.822 15.439 8.688
5.091 -4.367 38.300 47.729 14091 9.325
5.067 -4.582 37.800 47.196 13.523 1.1.820
5.058 -4.658 38.000 47.478 13.012 12.806
5.050 -4.732 37.200 46.509 12.518 13.888
5.042 -4.805 36.000 45.038 12.039 14.977
5.034 -4.876 34.300 42.949 11.576 16.136	 d
v
i
k
1TABLE-1 Continual
I
x
i
TIMI: fit, ANG 1-1NIT i-CRC'I, TAN ar AIRMASS
5.025 -4.949 32.100 40.273 11.101 17.423
5.018 -5.109 30.500 38.336 10.660 18.689
5.010 -5.090 28.700 36.141 10.228 20.039
5.002 -5.159 26.300 33.180 9.772 21.509
4.994 -5.230 24,000 30.330 9.287 23.170
4.986 -5.299 21.500 27.215 8.793 24.945
4.878 -5,368 18.400 23.329 8.269 24.865
4.963 -5.500 12.200 15.516 7.52.0 30.521
4.955 -5.571 8.760 11.160 6.836 32.022
4.945 -5.659 5.500 7.021 6.286 35.142
5
35
30
25
5
0L
0 1.4	 1.60.2	 0.4	 0.6	 0.8	 1.0	 1.2
/3 A x 10 -3
 
II(M-11
FIGURE I
6
E
`-' 20
W
F- 15HJ
a
10
t,._
35
30
	 FLIGHT W-105
JUNE 7, 1975
25
20
15
10
5
0L
0	 5	 10	 15	 20	 25
EXTINCTION RATIO
FIGURI : 11
7


SAM 2 balloon test (stratospheric aerosol measurement)

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