PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-16:27:40
G02     68.7           24.9               11.3 +/-    1.25      22.2 +/-    1.25  0.030 / 0.040
G05     48.9           53.7               10.5 +/-    0.39      12.7 +/-    0.39  0.030 / 0.040
G12     183.7          22.3               13.5 +/-    2.24      28.0 +/-    2.24  0.080 / 0.190
G13     120.9          22.4               14.9 +/-    0.77      31.1 +/-    0.77  0.060 / 0.180
G15     157.2          21.0               13.8 +/-    1.39      29.6 +/-    1.39  0.040 / 0.050
G18     221.3          11.1               -1.5 +/-   28.74      -4.0 +/-   28.74  0.040 / 0.050
G20     216.8          71.1               13.9 +/-    0.64      14.6 +/-    0.64  0.050 / 0.130
G21     281.1          26.4               12.1 +/-    1.95      23.0 +/-    1.95  0.050 / 0.140
G25     221.7          42.7               15.3 +/-    1.57      21.4 +/-    1.57  0.040 / 0.080
G29     345.1          71.0               12.3 +/-    1.00      12.9 +/-    1.00  0.050 / 0.080