PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-01:43:00
G10     276.9          42.8                9.2 +/-    0.60      12.9 +/-    0.60  0.120 / 0.250
G13     39.1           12.5                6.5 +/-    1.31      17.0 +/-    1.31  0.110 / 0.260
G15     52.8           43.8                8.5 +/-    0.56      11.7 +/-    0.56  0.060 / 0.160
G18     318.4          66.0                9.3 +/-    0.95      10.0 +/-    0.95  0.060 / 0.200
G20     61.5           26.8                7.6 +/-    1.36      14.3 +/-    1.36  0.040 / 0.040
G21     31.7           76.4               10.8 +/-    0.44      11.1 +/-    0.44  0.040 / 0.040
G24     113.7          19.1               13.0 +/-    1.07      29.2 +/-    1.07  0.060 / 0.070
G27     312.4          26.9                9.6 +/-    0.83      18.0 +/-    0.83  0.050 / 0.060
G29     167.9          20.0               11.7 +/-    0.80      25.7 +/-    0.80  0.080 / 0.130
G32     206.3          16.9               12.2 +/-    1.73      28.9 +/-    1.73  0.070 / 0.120