PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-22:57:40
G01     87.3           32.4               11.7 +/-    1.26      19.4 +/-    1.26  0.060 / 0.090
G07     127.7          43.8               14.5 +/-    0.88      19.9 +/-    0.88  0.060 / 0.100
G11     68.5           40.4               11.6 +/-    1.10      16.8 +/-    1.10  0.160 / 0.130
G13     292.3          36.3               12.0 +/-    3.19      18.6 +/-    3.19  0.150 / 0.170
G15     313.3          11.4               -5.0 +/-   21.38     -13.6 +/-   21.38  0.040 / 0.040
G17     217.0          52.7               15.1 +/-    1.24      18.5 +/-    1.24  0.050 / 0.040
G18     344.1          -15.8               8.1 +/-    1.44      19.8 +/-    1.44  0.040 / 0.050
G19     215.8          29.1               16.3 +/-    1.99      29.1 +/-    1.99  0.050 / 0.040
G28     355.1          61.5               11.4 +/-    0.96      12.8 +/-    0.96  0.050 / 0.080
G30     114.7          71.2               13.2 +/-    0.85      13.8 +/-    0.85  0.050 / 0.080