PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-21:12:50
G01     79.6           33.3               14.9 +/-    0.53      24.4 +/-    0.53  0.070 / 0.090
G07     132.7          38.2               15.8 +/-    1.07      23.6 +/-    1.07  0.070 / 0.100
G11     60.9           36.6               13.4 +/-    0.89      20.6 +/-    0.89  0.060 / 0.110
G13     284.3          37.5               15.2 +/-    1.30      23.0 +/-    1.30  0.050 / 0.120
G15     308.7          13.5                9.8 +/-    1.42      25.3 +/-    1.42  0.050 / 0.060
G17     222.8          57.0               14.9 +/-    0.92      17.4 +/-    0.92  0.040 / 0.060
G18     55.7           21.7               11.1 +/-    0.78      23.5 +/-    0.78  0.030 / 0.080
G19     219.3          34.4               17.7 +/-    1.06      28.3 +/-    1.06  0.040 / 0.090
G28     7.0            60.7               13.1 +/-    0.72      14.8 +/-    0.72  0.040 / 0.110
G30     126.1          66.9               15.4 +/-    0.72      16.6 +/-    0.72  0.040 / 0.100