June 21 1999 DC-8 Validation Experiment
On June 21st 1999 a MASTER validation experiment was conducted at Lake Tahoe, CA and Ivanpah Playa, CA by teams from the Jet Propulsion Laboratory (JPL) and the University of Arizona (UofA) respectively. The experiment involved overflights of the MASTER instrument at each of the 2 sites at 3 elevations. At Invanpah the 3 above sea level elevations were 3457m, 5530m, 7624m respectively. At L. Tahoe the 3 above sea level elevations were 4065m, 6067m and 8417m respectively. The MASTER instrument was flown on the NASA DC-8 Aircraft with custom air-fence. The radiance at the sensor was predicted by propagating ground measurements through the atmosphere and the predicted radiance compared to the MASTER measured radiance. The results for each of the MASTER channels at the 3 flight altitudes are summarized below.
| Channel Number | Center Wavelength |
Radiances (W/m2 um sr) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Low Altitude |
Medium Altitude |
High Altitude | ||||||||
| Predict | MASTER | %
Difference | Predict | MASTER | % Difference | Predict | MASTER | %
Difference | ||
|
1 |
0.459 |
124.358 |
122.566 |
1.441 |
131.015 |
127.962 |
2.330 |
135.797 |
134.401 |
1.028 |
|
2 |
0.5 |
142.783 |
144.083 |
-0.910 |
147.403 |
147.546 |
-0.097 |
150.498 |
153.022 |
-1.677 |
|
3 |
0.542 |
174.733 |
175.376 |
-0.368 |
177.920 |
177.194 |
0.408 |
179.690 |
181.893 |
-1.226 |
|
4 |
0.582 |
204.982 |
203.661 |
0.644 |
207.005 |
204.002 |
1.451 |
207.870 |
208.359 |
-0.235 |
|
5 |
0.663 |
204.071 |
210.522 |
-3.161 |
205.027 |
210.005 |
-2.428 |
205.342 |
213.873 |
-4.155 |
|
6 |
0.713 |
183.137 |
193.580 |
-5.702 |
182.533 |
191.957 |
-5.163 |
182.758 |
195.370 |
-6.901 |
|
7 |
0.753 |
169.266 |
180.505 |
-6.640 |
168.567 |
178.931 |
-6.149 |
168.299 |
181.433 |
-7.804 |
|
8 |
0.802 |
163.047 |
175.039 |
-7.355 |
162.920 |
173.230 |
-6.328 |
163.173 |
175.747 |
-7.706 |
|
9 |
0.868 |
142.625 |
156.359 |
-9.629 |
143.063 |
155.366 |
-8.600 |
143.293 |
157.265 |
-9.751 |
|
10 |
0.907 |
106.679 |
122.458 |
-14.792 |
105.057 |
119.652 |
-13.892 |
105.238 |
121.141 |
-15.112 |
|
11 |
0.949 |
61.200 |
85.708 |
-40.047 |
58.344 |
81.535 |
-39.749 |
58.529 |
82.100 |
-40.272 |
|
12 |
1.609 |
42.914 |
45.182 |
-5.285 |
42.908 |
45.601 |
-6.276 |
42.843 |
46.056 |
-7.500 |
|
13 |
1.664 |
39.173 |
41.896 |
-6.952 |
39.186 |
42.315 |
-7.985 |
39.176 |
42.727 |
-9.065 |
|
14 |
1.72 |
32.467 |
35.605 |
-9.663 |
32.289 |
35.839 |
-10.996 |
32.317 |
36.204 |
-12.027 |
|
15 |
1.774 |
17.275 |
21.224 |
-22.860 |
16.717 |
20.917 |
-25.122 |
16.782 |
21.168 |
-26.139 |
|
16 |
1.828 |
0.930 |
0.379 |
59.194 |
0.827 |
0.355 |
57.130 |
0.838 |
0.354 |
57.720 |
|
17 |
1.876 |
0.074 |
1.726 |
-2231.770 |
0.071 |
1.577 |
-2133.612 |
0.071 |
1.521 |
-2051.216 |
|
18 |
1.926 |
0.567 |
3.169 |
-458.804 |
0.476 |
2.876 |
-504.441 |
0.467 |
2.862 |
-512.532 |
|
19 |
1.98 |
7.445 |
9.797 |
-31.591 |
6.867 |
9.403 |
-36.930 |
6.746 |
9.357 |
-38.693 |
|
20 |
2.08 |
14.831 |
16.071 |
-8.361 |
14.452 |
15.968 |
-10.488 |
14.257 |
15.898 |
-11.513 |
|
21 |
2.16 |
14.546 |
15.650 |
-7.594 |
14.516 |
15.733 |
-8.384 |
14.520 |
15.800 |
-8.812 |
|
22 |
2.21 |
12.188 |
13.786 |
-13.112 |
12.151 |
13.812 |
-13.666 |
12.138 |
13.841 |
-14.031 |
|
23 |
2.258 |
11.282 |
12.467 |
-10.505 |
11.232 |
12.455 |
-10.888 |
11.174 |
12.434 |
-11.280 |
|
24 |
2.328 |
8.494 |
8.987 |
-5.810 |
8.348 |
8.903 |
-6.657 |
8.278 |
8.883 |
-7.308 |
|
25 |
2.393 |
5.178 |
5.457 |
-5.400 |
4.967 |
5.334 |
-7.390 |
4.948 |
5.365 |
-8.413 |
% Difference = (P-M/P)*100
| Channel Number | Center Wavelength |
Radiances (W/m2 um sr) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Low Altitude |
Medium Altitude |
High Altitude | ||||||||
| Predict | MASTER | %
Difference | Predict | MASTER | % Difference | Predict | MASTER | %
Difference | ||
|
41 |
7.746 |
6.041 |
5.766 |
4.552 |
5.340 |
5.254 |
1.607 |
4.755 |
4.650 |
2.213 |
|
42 |
8.163 |
6.916 |
6.813 |
1.490 |
6.666 |
6.618 |
0.722 |
6.492 |
6.428 |
0.990 |
|
43 |
8.607 |
7.422 |
7.386 |
0.487 |
7.328 |
7.301 |
0.378 |
7.287 |
7.261 |
0.363 |
|
44 |
9.045 |
7.717 |
7.686 |
0.401 |
7.655 |
7.629 |
0.342 |
7.638 |
7.604 |
0.441 |
|
45 |
9.671 |
7.952 |
7.920 |
0.406 |
7.863 |
7.716 |
1.872 |
7.746 |
7.642 |
1.337 |
|
46 |
10.086 |
7.997 |
7.972 |
0.313 |
7.958 |
7.909 |
0.620 |
7.942 |
7.894 |
0.604 |
|
46 |
10.618 |
7.948 |
7.927 |
0.261 |
7.910 |
7.889 |
0.265 |
7.907 |
7.876 |
0.386 |
|
48 |
11.313 |
7.748 |
7.718 |
0.378 |
7.710 |
7.683 |
0.358 |
7.711 |
7.674 |
0.487 |
|
49 |
12.111 |
7.367 |
7.298 |
0.931 |
7.317 |
7.241 |
1.036 |
7.310 |
7.243 |
0.908 |
|
50 |
12.869 |
6.907 |
6.813 |
1.351 |
6.803 |
6.746 |
0.832 |
6.747 |
6.714 |
0.490 |
% Difference = (P-M/P)*100
| Channel Number | Center Wavelength |
Brightness Temperatures | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Low Altitude |
Medium Altitude |
High Altitude | ||||||||
| Predict | MASTER | BT
Difference | Predict | MASTER | BT Difference | Predict | MASTER | BT
Difference | ||
|
41 |
7.746 |
9.898 |
7.904 |
1.994 |
4.682 |
4.011 |
0.671 |
-0.050 |
-0.946 |
0.896 |
|
42 |
8.163 |
12.722 |
12.027 |
0.694 |
11.027 |
10.696 |
0.331 |
9.826 |
9.375 |
0.451 |
|
43 |
8.607 |
13.528 |
13.287 |
0.241 |
12.908 |
12.723 |
0.185 |
12.635 |
12.457 |
0.178 |
|
44 |
9.045 |
13.726 |
13.518 |
0.208 |
13.314 |
13.138 |
0.176 |
13.196 |
12.969 |
0.227 |
|
45 |
9.671 |
13.948 |
13.723 |
0.225 |
13.328 |
12.294 |
1.033 |
12.509 |
11.776 |
0.733 |
|
46 |
10.086 |
14.015 |
13.835 |
0.181 |
13.734 |
13.378 |
0.356 |
13.617 |
13.271 |
0.347 |
|
46 |
10.618 |
14.010 |
13.852 |
0.158 |
13.725 |
13.565 |
0.160 |
13.701 |
13.468 |
0.233 |
|
48 |
11.313 |
13.920 |
13.677 |
0.243 |
13.610 |
13.381 |
0.229 |
13.618 |
13.305 |
0.312 |
|
49 |
12.111 |
13.541 |
12.905 |
0.636 |
13.080 |
12.375 |
0.705 |
13.010 |
12.391 |
0.619 |
|
50 |
12.869 |
12.851 |
11.878 |
0.973 |
11.771 |
11.177 |
0.594 |
11.182 |
10.834 |
0.348 |
BT Difference = (P-M)