PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-19:42:50
G01     116.3          20.0               15.2 +/-    0.69      33.4 +/-    0.69  0.040 / 0.070
G07     87.7           65.2               13.5 +/-    0.30      14.7 +/-    0.30  0.040 / 0.080
G08     44.7           32.1               10.3 +/-    0.91      17.3 +/-    0.91  0.130 / 0.230
G09     176.9          23.3               14.8 +/-    1.90      30.2 +/-    1.90  0.120 / 0.170
G11     104.6          41.2               14.5 +/-    1.20      20.8 +/-    1.20  0.030 / 0.040
G13     316.2          21.6                9.6 +/-    1.96      20.4 +/-    1.96  0.030 / 0.050
G17     203.9          23.8               16.2 +/-    2.43      32.6 +/-    2.43  0.050 / 0.100
G18     91.4           22.0               12.9 +/-    1.28      27.1 +/-    1.28  0.040 / 0.080
G28     299.5          58.7               12.6 +/-    0.63      14.5 +/-    0.63  0.040 / 0.060
G30     357.8          72.3               12.6 +/-    0.95      13.2 +/-    0.95  0.040 / 0.070