Altitude Variable Comparison

report produced with glance, version 0.2.6.10
comparison generated Tue Sep 29 19:18:12 2009 by user wstraka on craackly.ssec.wisc.edu

file A:

path: /data/wstraka/temp/NC4_NC3_TEST//NC3/MSG8_SEVIRI_2006236_1600_00_AWG_WINDS_AMV.nc
md5sum for file A: 8d77c43cd45738780486ad8ac36de437
last modified: Tue Sep 29 15:58:33 2009

file B:

path: /data/wstraka/temp/NC4_NC3_TEST//NC4/MSG8_SEVIRI_2006236_1600_00_AWG_WINDS_AMV.nc
md5sum for file B: 1a390d349d97b3bf1c8bec75627ba824
last modified: Tue Sep 29 15:45:05 2009

latitude: Latitude
longitude: Longitude

WARNING: 55748 data points (82.37% of all data) show possible mismatch in values stored in file a and file b longitude and latitude values. Depending on the degree of mismatch, some data value comparisons in this report may be distorted or spatially nonsensical. Please consider re-running this report and including an examination of your longitude and latitude variables with appropriate epsilons in order to analyze the significance of the difference.
View mismatching points in A's lon/lat system
View mismatching points in B's lon/lat system

Original Data

Comparison Information

variable name: Altitude
epsilon value: 0.1
"missing" data value in A: -999.0
"missing" data value in B: -999.0

Statistical Summary

Finite Data Statistics
a_finite_count*: 33181
a_finite_fraction*: 0.4903
b_finite_count*: 33207
b_finite_fraction*: 0.4906
common_finite_count*: 26148
common_finite_fraction*: 0.3863
finite_in_only_one_count*: 14092
finite_in_only_one_fraction*: 0.2082

General Statistics
a_missing_value*: -999
b_missing_value*: -999
epsilon*: 0.1
max_a*: 1.93e+04
max_b*: 1.93e+04
min_a*: -182.5
min_b*: -182.5
num_data_points*: 67681
shape*: (67681,)
spatially_invalid_pts_ignored_in_a*: 0
spatially_invalid_pts_ignored_in_b*: 0
trouble_points_count*: 33214
trouble_points_fraction*: 0.4907

Missing Value Statistics
a_missing_count*: 34500
a_missing_fraction*: 0.5097
b_missing_count*: 34474
b_missing_fraction*: 0.5094
common_missing_count*: 27441
common_missing_fraction*: 0.4054

NaN Statistics
a_nan_count*: 0
a_nan_fraction*: 0
b_nan_count*: 0
b_nan_fraction*: 0
common_nan_count*: 0
common_nan_fraction*: 0

Numerical Comparison Statistics
correlation*: 0.7547
diff_outside_epsilon_count*: 19122
diff_outside_epsilon_fraction*: 0.7313
max_diff*: 1.528e+04
mean_diff*: 1437
median_diff*: 229.8
perfect_match_count*: 6945
perfect_match_fraction*: 0.2656
rms_diff*: 2844
std_diff*: 2454