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Verification of LTPP Virtual Weather Stations Phase I Report: Accuracy and Reliability of Virtual Weather Stations
TASK 3: DETERMINE ACCURACY OF VWS ESTIMATES AND VERIFY THE VWS ALGORITHM
Table 30. Summary statistics for error of daily estimates of SMP maximum temperature using three different calculation methods.
No. |
SMP ID |
Days of Data |
Mean Error (SMP-Estimate) , °C |
Standard Deviation Error, °C |
IMS VWS |
Closest |
Weight 1/R^2 |
Weight 1/R |
No Weight |
IMS VWS |
Closest |
Weight 1/R^2 |
Weight 1/R |
No Weight |
1 |
100102 |
325 |
0.39 |
0.21 |
0.34 |
0.39 |
0.41 |
2.47 |
2 |
2.02 |
2.09 |
2.22 |
2 |
131005 |
392 |
-0.28 |
-0.48 |
-0.29 |
-0.18 |
0 |
2.73 |
3.77 |
2.8 |
2.45 |
2.32 |
3 |
133019 |
345 |
0.26 |
0.56 |
0.26 |
0.19 |
0.19 |
3.31 |
3.84 |
3.32 |
3.03 |
2.63 |
4 |
161010 |
499 |
1.43 |
0.8 |
0.83 |
0.97 |
1.25 |
1.92 |
3.25 |
3.16 |
2.78 |
2.23 |
5 |
183002 |
164 |
1.48 |
1.41 |
1.47 |
1.48 |
1.48 |
3.9 |
5.1 |
3.94 |
3.66 |
3.44 |
6 |
204054 |
293 |
1.4 |
2.35 |
1.43 |
1.06 |
0.74 |
3.27 |
2.63 |
3.31 |
3.69 |
3.98 |
7 |
231026 |
608 |
0.47 |
0.11 |
0.44 |
0.48 |
0.54 |
2.92 |
4.8 |
3.04 |
3.01 |
3.07 |
8 |
241634 |
493 |
1.28 |
1.75 |
1.3 |
1.19 |
1.08 |
1.58 |
1.97 |
1.61 |
1.66 |
1.75 |
9 |
251002 |
397 |
-0.22 |
-0.53 |
-0.2 |
-0.23 |
-0.27 |
3.48 |
4.71 |
3.49 |
3.5 |
3.54 |
10 |
271018 |
871 |
1.45 |
1.63 |
1.45 |
0.95 |
0.26 |
3.2 |
3.27 |
3.2 |
3.02 |
2.84 |
11 |
271028 |
744 |
0.76 |
0.65 |
0.75 |
0.74 |
0.71 |
2.23 |
2.19 |
2.23 |
2.36 |
2.53 |
12 |
274040 |
700 |
0.89 |
0.47 |
0.47 |
0.48 |
0.73 |
4.36 |
1.84 |
1.84 |
1.83 |
3.3 |
13 |
276251 |
659 |
-0.77 |
-0.78 |
-0.77 |
-0.69 |
-0.57 |
4.59 |
4.62 |
4.59 |
4.37 |
3.71 |
14 |
281016 |
275 |
0.2 |
0.2 |
0.54 |
0.49 |
0.18 |
3.09 |
3.1 |
1.78 |
1.77 |
2.03 |
15 |
281802 |
405 |
-1.05 |
-1.05 |
-1.07 |
-1.04 |
-0.97 |
2.09 |
1.66 |
1.78 |
2.1 |
2.56 |
16 |
308129 |
660 |
0.96 |
1.2 |
0.98 |
0.82 |
0.67 |
2.85 |
2.7 |
2.85 |
2.87 |
2.85 |
17 |
310114 |
293 |
0.59 |
0.29 |
0.59 |
0.9 |
1.22 |
4.7 |
5.84 |
4.72 |
3.73 |
2.8 |
18 |
313018 |
279 |
0.42 |
0.53 |
0.5 |
0.66 |
0.95 |
5.54 |
1.41 |
2.16 |
2.72 |
3.3 |
19 |
320204 |
50 |
0.18 |
0.28 |
0.19 |
0.1 |
-0.02 |
1.92 |
1.94 |
1.88 |
1.89 |
2.02 |
20 |
331001 |
586 |
0.47 |
0.47 |
0.46 |
0.44 |
0.24 |
0.71 |
0.72 |
0.71 |
0.79 |
2.18 |
21 |
351112 |
350 |
0.93 |
1.72 |
1.28 |
1.33 |
1.4 |
1.58 |
1.31 |
1.12 |
1.2 |
1.42 |
22 |
360801 |
345 |
1.18 |
1.27 |
1.18 |
1.16 |
1.15 |
2.48 |
2.63 |
2.49 |
2.59 |
2.77 |
23 |
364018 |
594 |
0.2 |
-0.69 |
-0.67 |
-0.51 |
-0.02 |
3.28 |
1.05 |
1.04 |
1.15 |
2.67 |
24 |
371028 |
454 |
0.03 |
1.06 |
0.05 |
-0.04 |
-0.12 |
1.79 |
2.41 |
1.86 |
1.91 |
1.98 |
25 |
404165 |
487 |
0.84 |
0.47 |
0.83 |
1.02 |
1.19 |
3.76 |
4.92 |
3.77 |
3.19 |
2.71 |
26 |
421606 |
348 |
0.02 |
-0.06 |
0.03 |
0.03 |
0.01 |
1.98 |
0.79 |
1.95 |
2.46 |
2.89 |
27 |
460804 |
394 |
0.52 |
0.33 |
0.51 |
0.54 |
0.5 |
1.73 |
2.06 |
1.74 |
1.66 |
1.68 |
28 |
469187 |
262 |
0.22 |
1.83 |
0.75 |
0.62 |
0.5 |
3.55 |
4.81 |
3.87 |
3.73 |
3.58 |
29 |
481060 |
563 |
0.85 |
0.84 |
0.84 |
0.84 |
0.84 |
1.45 |
1.69 |
1.45 |
1.44 |
1.45 |
30 |
481068 |
570 |
-0.37 |
-0.53 |
-0.37 |
-0.31 |
-0.3 |
4.06 |
4.25 |
4.06 |
3.96 |
3.89 |
31 |
481077 |
539 |
0 |
-0.13 |
-0.01 |
0.1 |
0.2 |
2.27 |
0.89 |
2.26 |
2.48 |
2.58 |
32 |
481122 |
529 |
0 |
0.04 |
0 |
-0.07 |
-0.16 |
3.06 |
3.58 |
3.06 |
2.62 |
2.24 |
33 |
483739 |
410 |
-0.56 |
-1.02 |
-0.97 |
-0.84 |
-0.69 |
2.89 |
2.56 |
2.5 |
2.48 |
2.7 |
34 |
484142 |
602 |
-1.17 |
0.22 |
0.2 |
0.02 |
-0.46 |
4.06 |
4.1 |
4.05 |
3.72 |
3.28 |
35 |
484143 |
445 |
0.6 |
0.61 |
0.6 |
0.57 |
0.53 |
4.07 |
4.24 |
4.07 |
3.76 |
3.46 |
36 |
491001 |
525 |
0.17 |
0.16 |
0.17 |
0.17 |
-0.02 |
1.37 |
1.38 |
1.37 |
1.34 |
1.55 |
37 |
493011 |
582 |
1.56 |
1.62 |
1.58 |
1.41 |
0.95 |
2.12 |
2.19 |
1.83 |
1.76 |
1.93 |
38 |
501002 |
519 |
-0.48 |
-1.61 |
-0.52 |
-0.29 |
0.02 |
3.16 |
4.77 |
3.23 |
2.83 |
2.3 |
39 |
510114 |
263 |
0.78 |
1.08 |
0.78 |
0.56 |
0.4 |
4.22 |
4.38 |
4.23 |
3.93 |
3.48 |
40 |
533813 |
218 |
1.14 |
1.44 |
1.15 |
0.78 |
0.39 |
3.29 |
3.89 |
3.3 |
2.68 |
2.17 |
41 |
561007 |
556 |
0.47 |
0.56 |
0.47 |
0.39 |
0.29 |
3.95 |
5.15 |
3.99 |
3.94 |
4.04 |
42 |
831801 |
938 |
0.03 |
0.18 |
0.04 |
0.01 |
-0.03 |
1.28 |
1.74 |
1.29 |
1.23 |
1.16 |
43 |
833802 |
544 |
-0.18 |
-0.19 |
-0.09 |
0.04 |
0.11 |
1.37 |
1.38 |
1.23 |
1.3 |
1.3 |
44 |
871622 |
545 |
0.25 |
0.23 |
0.24 |
0.26 |
0.27 |
1.26 |
1.44 |
1.28 |
1.22 |
1.23 |
45 |
906405 |
594 |
0.23 |
-0.45 |
-0.21 |
-0.08 |
0.05 |
1.7 |
2.2 |
1.91 |
1.79 |
1.72 |
All Days |
21214 |
0.37 |
0.37 |
0.36 |
0.34 |
0.31 |
3.02 |
3.25 |
2.83 |
2.7 |
2.7 |
Avg. Section |
471.42 |
0.39 |
0.42 |
0.39 |
0.38 |
0.35 |
2.81 |
2.91 |
2.61 |
2.53 |
2.57 |
Table 31. Summary statistics for error of daily estimates of SMP minimum temperature using three different calculation methods.
No. |
SMP ID |
Days of Data |
Mean Error (SMP-Estimate) , °C |
Standard Deviation Error, °C |
IMS VWS |
Closest |
Weight 1/R^2 |
Weight 1/R |
No Weight |
IMS VWS |
Closest |
Weight 1/R^2 |
Weight 1/R |
No Weight |
1 |
100102 |
325 |
1.07 |
0.9 |
1.34 |
1.6 |
1.85 |
1.84 |
1.93 |
1.86 |
1.86 |
1.91 |
2 |
131005 |
392 |
-0.82 |
-0.82 |
-0.81 |
-0.76 |
-0.62 |
1.87 |
2.36 |
1.87 |
1.71 |
1.71 |
3 |
133019 |
345 |
1.88 |
2.52 |
1.89 |
1.67 |
1.56 |
2.28 |
2.53 |
2.29 |
2.16 |
1.98 |
4 |
161010 |
499 |
1.08 |
-0.89 |
-0.78 |
-0.36 |
0.35 |
1.92 |
3.27 |
3.15 |
2.69 |
2.1 |
5 |
183002 |
164 |
-0.44 |
-0.77 |
-0.45 |
-0.4 |
-0.37 |
2.79 |
3.72 |
2.85 |
2.65 |
2.51 |
6 |
204054 |
293 |
0.43 |
1.18 |
0.47 |
0.15 |
-0.12 |
2.05 |
1.91 |
2.1 |
2.22 |
2.29 |
7 |
231026 |
608 |
0.5 |
-0.8 |
0.44 |
0.69 |
0.97 |
2.56 |
3.84 |
2.66 |
2.61 |
2.64 |
8 |
241634 |
493 |
0.19 |
0.02 |
0.19 |
0.25 |
0.3 |
1.33 |
2.18 |
1.33 |
1.3 |
1.3 |
9 |
251002 |
397 |
-2.21 |
-3.7 |
-2.22 |
-2.18 |
-2.14 |
2.05 |
3.19 |
2.19 |
2.17 |
2.16 |
10 |
271018 |
871 |
1.14 |
1.26 |
1.14 |
0.78 |
0.27 |
2.01 |
2.1 |
2.01 |
1.79 |
1.57 |
11 |
271028 |
744 |
0.16 |
-0.27 |
0.15 |
0.16 |
0.13 |
2.1 |
2.88 |
2.1 |
2.08 |
2.12 |
12 |
274040 |
700 |
-0.04 |
-0.31 |
-0.31 |
-0.3 |
-0.24 |
3.4 |
2.07 |
2.07 |
2.02 |
2.63 |
13 |
276251 |
659 |
-0.34 |
-0.35 |
-0.34 |
-0.21 |
0.22 |
4.07 |
4.11 |
4.08 |
3.82 |
3.28 |
14 |
281016 |
275 |
-0.64 |
-0.64 |
0.19 |
0.14 |
-0.34 |
2.44 |
2.45 |
1.45 |
1.43 |
1.64 |
15 |
281802 |
405 |
0.95 |
1.12 |
0.93 |
0.82 |
0.66 |
1.85 |
1.76 |
1.61 |
1.72 |
1.97 |
16 |
308129 |
660 |
-0.35 |
-0.22 |
-0.36 |
-0.42 |
-0.46 |
2.46 |
2.65 |
2.47 |
2.49 |
2.58 |
17 |
310114 |
293 |
-1.16 |
-1.54 |
-1.16 |
-0.81 |
-0.45 |
2.95 |
3.64 |
2.96 |
2.36 |
1.81 |
18 |
313018 |
279 |
-1.56 |
-0.8 |
-1.02 |
-1.05 |
-1.02 |
2.8 |
1.51 |
1.46 |
1.54 |
1.73 |
19 |
320204 |
50 |
-0.02 |
-0.05 |
-0.03 |
-0.03 |
-0.07 |
1.89 |
1.98 |
1.91 |
1.9 |
1.99 |
20 |
331001 |
586 |
-1.18 |
-1.19 |
-1.18 |
-1.11 |
-0.77 |
1.1 |
1.12 |
1.1 |
0.97 |
1.39 |
21 |
351112 |
350 |
-0.08 |
1.71 |
0.78 |
0.64 |
0.56 |
1.7 |
2.18 |
1.71 |
1.6 |
1.53 |
22 |
360801 |
345 |
0.08 |
0.32 |
0.08 |
-0.03 |
-0.17 |
1.81 |
2.02 |
1.82 |
1.84 |
1.92 |
23 |
364018 |
594 |
-0.84 |
1.19 |
1.15 |
0.78 |
-0.38 |
2.84 |
2.65 |
2.61 |
2.25 |
2.36 |
24 |
371028 |
454 |
1.04 |
1.28 |
1.04 |
1.03 |
1.03 |
1.68 |
2.38 |
1.69 |
1.68 |
1.68 |
25 |
404165 |
487 |
0.5 |
0.06 |
0.49 |
0.7 |
0.83 |
2.56 |
3.21 |
2.57 |
2.29 |
2.1 |
26 |
421606 |
348 |
-0.27 |
0.34 |
-0.25 |
-0.5 |
-0.76 |
1.25 |
0.88 |
1.24 |
1.55 |
1.84 |
27 |
460804 |
394 |
-0.36 |
-0.31 |
-0.35 |
-0.38 |
-0.4 |
1.8 |
2.13 |
1.81 |
1.66 |
1.58 |
28 |
469187 |
262 |
0.83 |
1.08 |
0.92 |
0.85 |
0.77 |
1.72 |
2.5 |
1.77 |
1.73 |
1.7 |
29 |
481060 |
563 |
0.9 |
0.74 |
0.9 |
0.94 |
0.97 |
1.54 |
1.91 |
1.54 |
1.51 |
1.5 |
30 |
481068 |
570 |
-1 |
-1.02 |
-1 |
-0.98 |
-0.94 |
2.76 |
2.91 |
2.77 |
2.72 |
2.72 |
31 |
481077 |
539 |
-0.03 |
0.45 |
-0.02 |
-0.13 |
-0.24 |
1.63 |
1.51 |
1.63 |
1.67 |
1.7 |
32 |
481122 |
529 |
-0.79 |
-0.78 |
-0.79 |
-0.78 |
-0.74 |
2.61 |
3.01 |
2.61 |
2.29 |
2.06 |
33 |
483739 |
410 |
0.47 |
0.47 |
0.46 |
0.5 |
0.6 |
2.36 |
2.39 |
2.3 |
2.16 |
2.22 |
34 |
484142 |
602 |
-0.26 |
-0.01 |
-0.01 |
0 |
0.01 |
3.18 |
3.31 |
3.27 |
3.01 |
2.73 |
35 |
484143 |
445 |
0.66 |
0.54 |
0.66 |
0.88 |
1.16 |
6.98 |
7.03 |
6.98 |
6.89 |
6.82 |
36 |
491001 |
525 |
-1.73 |
-1.78 |
-1.73 |
-1.49 |
-1.17 |
1.66 |
1.72 |
1.67 |
1.42 |
1.62 |
37 |
493011 |
582 |
-0.08 |
-0.04 |
-0.1 |
-0.18 |
-0.32 |
2 |
2.07 |
1.83 |
1.78 |
1.84 |
38 |
501002 |
519 |
-0.36 |
-2.54 |
-0.44 |
-0.13 |
0.26 |
3.13 |
4.37 |
3.22 |
2.95 |
2.62 |
39 |
510114 |
263 |
-0.51 |
0.03 |
-0.49 |
-0.86 |
-1.14 |
2.89 |
3.01 |
2.88 |
2.63 |
2.26 |
40 |
533813 |
218 |
-1.09 |
-1.17 |
-1.09 |
-1.05 |
-1.07 |
1.75 |
2.1 |
1.76 |
1.45 |
1.33 |
41 |
561007 |
556 |
-1 |
-1.84 |
-1.03 |
-0.96 |
-1.02 |
3.3 |
4.01 |
3.32 |
3.28 |
3.35 |
42 |
831801 |
938 |
-0.17 |
-0.43 |
-0.16 |
-0.21 |
-0.27 |
1.39 |
1.61 |
1.39 |
1.4 |
1.41 |
43 |
833802 |
544 |
-0.09 |
-0.09 |
-0.13 |
-0.19 |
-0.28 |
2.64 |
2.66 |
2.65 |
2.52 |
2.06 |
44 |
871622 |
545 |
0.12 |
-0.17 |
0.12 |
0.37 |
0.63 |
1.81 |
2.11 |
1.81 |
1.73 |
1.83 |
45 |
906405 |
594 |
0.68 |
0.67 |
0.68 |
0.7 |
0.72 |
2.03 |
3.13 |
2.58 |
2.34 |
2.17 |
All Days |
21214 |
-0.08 |
-0.16 |
-0.03 |
-0.02 |
-0.02 |
2.66 |
3.03 |
2.63 |
2.5 |
2.44 |
Avg. Section |
471.42 |
-0.11 |
-0.15 |
-0.05 |
-0.04 |
-0.04 |
2.33 |
2.62 |
2.29 |
2.17 |
2.14 |
|
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