PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-14:58:00
G01     99.0           29.2                8.1 +/-    0.94      14.3 +/-    0.94  0.030 / 0.030
G07     117.4          52.2                8.6 +/-    0.54      10.6 +/-    0.54  0.040 / 0.030
G08     41.7           13.6                5.5 +/-    1.56      14.2 +/-    1.56  0.060 / 0.120
G11     77.8           42.0                8.6 +/-    0.80      12.1 +/-    0.80  0.060 / 0.130
G13     302.7          33.0                9.5 +/-    0.94      15.7 +/-    0.94  0.040 / 0.070
G17     209.6          45.4               11.9 +/-    1.08      15.9 +/-    1.08  0.040 / 0.080
G18     71.7           24.6                8.3 +/-    0.71      16.4 +/-    0.71  0.030 / 0.050
G19     211.8          17.5                9.5 +/-    1.96      22.3 +/-    1.96  0.030 / 0.050
G28     333.3          61.8                8.5 +/-    0.59       9.5 +/-    0.59  0.040 / 0.060
G30     63.1           80.0                8.1 +/-    0.73       8.2 +/-    0.73  0.040 / 0.050