PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-18:12:50
G01     116.3          20.0               14.7 +/-    0.90      32.4 +/-    0.90  0.050 / 0.080
G07     87.8           65.2               14.6 +/-    0.41      15.9 +/-    0.41  0.050 / 0.080
G08     44.4           31.0               11.4 +/-    0.81      19.6 +/-    0.81  0.040 / 0.040
G09     176.6          22.9               15.3 +/-    2.16      31.4 +/-    2.16  0.030 / 0.030
G11     103.8          41.2               15.4 +/-    0.68      22.0 +/-    0.68  0.040 / 0.070
G13     316.1          21.8                9.9 +/-    1.31      20.8 +/-    1.31  0.060 / 0.100
G17     203.5          24.9               15.5 +/-    2.53      30.2 +/-    2.53  0.040 / 0.050
G18     91.3           22.0               12.9 +/-    1.88      27.0 +/-    1.88  0.050 / 0.060
G28     299.3          58.7               13.3 +/-    0.67      15.3 +/-    0.67  0.020 / 0.050
G30     355.6          71.9               13.6 +/-    1.06      14.2 +/-    1.06  0.030 / 0.040