PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-22:12:50
G01     64.6           31.9                9.7 +/-    1.38      16.3 +/-    1.38  0.120 / 0.250
G07     140.4          26.5               11.9 +/-    1.04      22.5 +/-    1.04  0.140 / 0.240
G11     51.3           28.4                8.7 +/-    2.18      15.7 +/-    2.18  0.050 / 0.090
G13     268.1          36.4               12.3 +/-    1.70      19.0 +/-    1.70  0.040 / 0.090
G15     297.5          16.2                9.7 +/-    0.96      23.4 +/-    0.96  0.030 / 0.040
G17     241.4          69.0               11.3 +/-    0.61      12.0 +/-    0.61  0.040 / 0.050
G18     45.4           15.7                9.1 +/-    2.13      22.1 +/-    2.13  0.050 / 0.100
G19     228.7          46.3               12.0 +/-    2.38      15.9 +/-    2.38  0.060 / 0.120
G28     29.7           57.7               11.9 +/-    0.77      13.8 +/-    0.77  0.110 / 0.290
G30     140.2          54.3               12.6 +/-    0.42      15.2 +/-    0.42  0.090 / 0.300