PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-21:58:00
G01     79.6           33.3               11.3 +/-    1.32      18.5 +/-    1.32  0.110 / 0.180
G07     132.7          38.2               14.2 +/-    0.84      21.2 +/-    0.84  0.080 / 0.190
G11     61.2           36.9               10.7 +/-    1.14      16.5 +/-    1.14  0.030 / 0.030
G13     284.4          37.5               12.3 +/-    0.75      18.7 +/-    0.75  0.040 / 0.030
G15     308.5          13.6                9.5 +/-    2.04      24.5 +/-    2.04  0.070 / 0.120
G17     222.8          57.7               14.0 +/-    2.00      16.2 +/-    2.00  0.060 / 0.100
G18     55.8           21.7               10.3 +/-    4.14      21.8 +/-    4.14  0.030 / 0.060
G19     219.3          34.6               15.8 +/-    1.65      25.2 +/-    1.65  0.030 / 0.060
G28     7.1            60.6               11.6 +/-    1.36      13.1 +/-    1.36  0.230 / 0.290
G30     126.2          66.4               13.7 +/-    0.75      14.8 +/-    0.75  0.170 / 0.190