PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-11:12:50
G01     124.9          13.3                2.9 +/-    2.75       7.4 +/-    2.75  0.040 / 0.040
G07     61.2           69.0                3.3 +/-    0.38       3.5 +/-    0.38  0.030 / 0.030
G08     47.7           35.5                0.8 +/-    0.67       1.3 +/-    0.67  0.040 / 0.030
G09     175.9          30.9                5.4 +/-    1.59       9.3 +/-    1.59  0.030 / 0.030
G11     113.7          36.8                4.2 +/-    1.39       6.5 +/-    1.39  0.120 / 0.240
G13     320.3          14.0                0.1 +/-    1.72       0.3 +/-    1.72  0.120 / 0.190
G17     199.7          18.8                4.3 +/-    2.28       9.7 +/-    2.28  0.130 / 0.320
G18     100.6          17.8                3.1 +/-    1.17       7.3 +/-    1.17  0.140 / 0.320
G28     280.0          54.1                3.5 +/-    0.65       4.2 +/-    0.65  0.080 / 0.340
G30     333.7          61.3                2.5 +/-    0.72       2.8 +/-    0.72  0.100 / 0.340