PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-17:58:10
G01     108.3          24.9               12.1 +/-    1.27      23.7 +/-    1.27  0.060 / 0.140
G07     104.6          59.6               13.9 +/-    0.67      15.9 +/-    0.67  0.060 / 0.130
G08     42.3           23.2                8.8 +/-    0.72      17.8 +/-    0.72  0.030 / 0.030
G09     175.1          14.7               17.2 +/-    3.40      43.1 +/-    3.40  0.030 / 0.030
G11     91.7           42.9               12.8 +/-    0.40      17.8 +/-    0.40  0.040 / 0.050
G13     310.6          27.7               12.8 +/-    1.43      23.5 +/-    1.43  0.030 / 0.050
G17     206.2          33.9               16.0 +/-    1.46      25.9 +/-    1.46  0.040 / 0.060
G18     82.1           24.2               11.2 +/-    0.72      22.3 +/-    0.72  0.030 / 0.080
G28     315.8          60.8               13.0 +/-    0.66      14.7 +/-    0.66  0.040 / 0.060
G30     21.4           77.6               15.1 +/-    0.57      15.4 +/-    0.57  0.040 / 0.050