PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/23-06:13:00
G01     83.8           32.8                4.8 +/-    0.63       8.0 +/-    0.63  0.020 / 0.040
G07     130.2          39.0                8.2 +/-    0.36      12.1 +/-    0.36  0.030 / 0.040
G11     61.2           36.3                4.8 +/-    0.49       7.4 +/-    0.49  0.070 / 0.140
G13     287.8          37.7               -0.5 +/-    1.11      -0.8 +/-    1.11  0.080 / 0.130
G15     313.2          10.7               -3.0 +/-   16.95      -8.2 +/-   16.95  0.030 / 0.050
G17     218.3          61.7                8.4 +/-    0.68       9.4 +/-    0.68  0.040 / 0.050
G19     217.1          29.4                7.4 +/-    1.46      13.1 +/-    1.46  0.030 / 0.060
G28     355.6          61.5                6.4 +/-    0.96       7.2 +/-    0.96  0.050 / 0.070
G30     117.7          73.7                7.6 +/-    0.96       7.9 +/-    0.96  0.040 / 0.080