Wind Errors

Quality thresholds applied to Forward-Aftward Wind Differences
(version F08_0016)

	Basic Thresholds (all must be satisifed for "good" winds)	Enhanced Thresholds (two or more must be satisifed for "better" winds)
NS wind component	10 m/s	3 m/s
EW wind component	3 m/s	1 m/s
Height	1000 m	300 m
Direction	45°	not used

Summary Statistics of Forward-Aftward Wind Differences
(version F08_0016)

	All Winds	"Good" Winds	"Better" Winds	"Good" Winds for GMAO Comparison
Number	10 237	6 886	4 602	6 295
Coverage	100 %	67 %	45 %	61 %
Speed bias (m/s)	-0.10	-0.20	-0.14	-0.17
Speed rms (m/s)	19.1	2.4	1.5	2.7
Direction bias	3.1°	0.9°	0.5°	2.2°
Direction rms	55°	17°	14°	24°
Vector rms (m/s)	23.2	3.7	2.2	3.9
Height bias (m)	133	38	18	30
Height rms (m)	2 102	291	165	649

Estimated Accuracies of Wind Vectors from GMAO Comparison
(Version F08_0015)

	low level > 700 hPa	middle 400 < level <= 700	high level < 400 hPa
speed bias (m/s)	0.09	-0.02	1.01
rms speed difference (m/s)	5.1	7.4	10.5
mean speed (m/s)	8.6	12.1	24.3
normalized rms speed difference	0.59	0.62	0.43
Num of observations	70 091	12 442	2 631

Main Quality Statement | MISR Data and Information | ASDC Home Page | Questions/Feedback