PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-19:42:50
G01     73.5           32.8               11.4 +/-    1.09      18.8 +/-    1.09  0.030 / 0.030
G07     135.5          27.2               15.5 +/-    1.28      28.9 +/-    1.28  0.030 / 0.030
G11     54.6           32.1               11.0 +/-    1.44      18.5 +/-    1.44  0.060 / 0.110
G13     277.1          38.6               15.0 +/-    0.98      22.3 +/-    0.98  0.070 / 0.160
G15     304.2          15.1                8.7 +/-    1.98      21.5 +/-    1.98  0.040 / 0.060
G17     227.6          67.1               16.8 +/-    0.81      18.1 +/-    0.81  0.040 / 0.040
G18     49.5           18.3                9.9 +/-    3.21      22.6 +/-    3.21  0.300 / 0.270
G19     221.4          39.8               17.5 +/-    1.48      25.5 +/-    1.48  0.160 / 0.220
G28     5.2            61.1               12.4 +/-    0.85      14.0 +/-    0.85  0.080 / 0.130
G30     132.6          62.5               15.6 +/-    0.46      17.4 +/-    0.46  0.070 / 0.120