PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-15:12:50
G01     81.9           33.1               12.1 +/-    0.95      19.9 +/-    0.95  0.030 / 0.020
G07     131.3          39.5               13.6 +/-    0.98      20.0 +/-    0.98  0.030 / 0.030
G11     60.9           36.1               13.4 +/-    0.98      20.9 +/-    0.98  0.040 / 0.080
G13     286.1          37.6               14.4 +/-    0.72      21.8 +/-    0.72  0.040 / 0.060
G15     312.2          11.3                8.0 +/-   16.93      21.7 +/-   16.93  0.060 / 0.100
G17     220.6          60.2               13.9 +/-    1.65      15.7 +/-    1.65  0.060 / 0.080
G18     56.8           21.9               11.6 +/-    2.32      24.5 +/-    2.32  0.090 / 0.210
G19     218.2          30.7               13.2 +/-    3.35      22.8 +/-    3.35  0.160 / 0.200
G28     2.3            61.1               12.9 +/-    0.59      14.5 +/-    0.59  0.060 / 0.070
G30     121.7          71.4               14.6 +/-    0.58      15.3 +/-    0.58  0.080 / 0.090