PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-17:42:50
G01     108.2          25.0               14.7 +/-    0.99      28.8 +/-    0.99  0.120 / 0.250
G07     104.9          59.5               16.2 +/-    1.08      18.5 +/-    1.08  0.270 / 0.140
G08     42.3           22.9               10.7 +/-    1.78      22.1 +/-    1.78  0.030 / 0.030
G09     175.0          14.5               13.4 +/-    1.65      33.7 +/-    1.65  0.030 / 0.040
G11     91.4           42.9               16.9 +/-    0.62      23.4 +/-    0.62  0.030 / 0.030
G13     310.5          27.9               13.6 +/-    1.35      25.0 +/-    1.35  0.020 / 0.020
G17     206.2          34.3               17.0 +/-    1.26      27.3 +/-    1.26  0.090 / 0.140
G18     81.8           24.2               14.0 +/-    2.47      27.9 +/-    2.47  0.110 / 0.170
G28     316.1          60.8               13.7 +/-    0.88      15.4 +/-    0.88  0.080 / 0.160
G30     21.6           77.6               16.1 +/-    0.41      16.5 +/-    0.41  0.070 / 0.130