PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-15:12:50
G01     103.9          26.3                9.8 +/-    1.33      18.7 +/-    1.33  0.030 / 0.050
G07     112.6          51.8               10.3 +/-    0.39      12.7 +/-    0.39  0.030 / 0.050
G08     41.8           19.8                7.5 +/-    0.92      16.6 +/-    0.92  0.040 / 0.060
G09     175.1          12.9               10.3 +/-    1.89      26.8 +/-    1.89  0.040 / 0.060
G11     84.9           43.4                9.3 +/-    0.57      12.8 +/-    0.57  0.050 / 0.070
G13     307.2          31.0               10.0 +/-    2.03      17.1 +/-    2.03  0.070 / 0.080
G17     206.4          38.3               12.1 +/-    1.40      18.1 +/-    1.40  0.070 / 0.110
G18     76.5           24.2                8.5 +/-    0.72      16.8 +/-    0.72  0.070 / 0.140
G28     311.2          59.2               10.1 +/-    0.96      11.6 +/-    0.96  0.040 / 0.080
G30     50.1           78.9                9.8 +/-    0.49       9.9 +/-    0.49  0.040 / 0.080