PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-18:57:40
G01     79.6           33.3               10.4 +/-    1.12      17.1 +/-    1.12  0.130 / 0.270
G07     132.7          38.1               13.6 +/-    0.68      20.5 +/-    0.68  0.140 / 0.180
G11     60.2           36.0               10.9 +/-    0.92      17.1 +/-    0.92  0.040 / 0.060
G13     284.0          37.6               13.2 +/-    0.92      20.0 +/-    0.92  0.030 / 0.060
G15     309.3          13.0               11.4 +/-    1.68      29.7 +/-    1.68  0.030 / 0.020
G17     222.8          59.2               14.1 +/-    1.67      16.1 +/-    1.67  0.030 / 0.020
G18     55.5           21.6                9.7 +/-    4.38      20.5 +/-    4.38  0.310 / 0.160
G19     219.3          33.7               15.2 +/-    1.71      24.7 +/-    1.71  0.390 / 0.220
G28     6.6            60.7               11.1 +/-    1.59      12.6 +/-    1.59  0.070 / 0.100
G30     125.8          68.1               12.5 +/-    0.56      13.4 +/-    0.56  0.070 / 0.080