PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-18:43:10
G01     115.3          20.6               17.9 +/-    1.11      38.7 +/-    1.11  0.050 / 0.100
G07     90.2           64.6               15.7 +/-    0.38      17.2 +/-    0.38  0.050 / 0.100
G08     44.1           30.4               12.1 +/-    0.94      21.0 +/-    0.94  0.030 / 0.030
G09     176.6          22.0               16.9 +/-    1.56      35.5 +/-    1.56  0.030 / 0.030
G11     102.6          41.5               16.9 +/-    0.74      24.0 +/-    0.74  0.120 / 0.190
G13     315.6          22.5               10.2 +/-    1.45      21.1 +/-    1.45  0.110 / 0.160
G17     203.9          25.7               17.1 +/-    1.80      32.9 +/-    1.80  0.040 / 0.080
G18     90.2           22.4               14.8 +/-    1.39      30.8 +/-    1.39  0.050 / 0.090
G28     301.4          59.0               14.4 +/-    0.71      16.5 +/-    0.71  0.040 / 0.060
G30     358.8          72.8               15.0 +/-    0.95      15.7 +/-    0.95  0.040 / 0.060