PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-02:58:00
G01     99.1           27.4                7.0 +/-    0.95      13.0 +/-    0.95  0.030 / 0.020
G07     113.4          54.9                6.1 +/-    0.33       7.3 +/-    0.33  0.040 / 0.020
G08     41.4           14.8                3.2 +/-    1.75       7.9 +/-    1.75  0.120 / 0.190
G11     86.9           45.8                6.1 +/-    0.81       8.1 +/-    0.81  0.120 / 0.210
G13     304.5          33.1                3.7 +/-    2.14       6.1 +/-    2.14  0.040 / 0.080
G17     206.5          43.8                7.1 +/-    0.53       9.7 +/-    0.53  0.060 / 0.070
G19     209.2          19.8                5.9 +/-    2.67      13.1 +/-    2.67  0.050 / 0.050
G28     310.0          58.3                4.8 +/-    1.13       5.5 +/-    1.13  0.040 / 0.050
G30     22.7           80.1                4.0 +/-    1.44       4.1 +/-    1.44  0.110 / 0.210