PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-03:57:50
G07     320.0          52.7                4.5 +/-    0.67       5.5 +/-    0.67  0.130 / 0.210
G08     113.8          47.6                7.4 +/-    0.41       9.7 +/-    0.41  0.070 / 0.240
G09     231.6          82.6                6.3 +/-    0.62       6.3 +/-    0.62  0.080 / 0.040
G16     43.3           20.3                4.6 +/-    2.34      10.1 +/-    2.34  0.040 / 0.040
G23     151.5          54.0                8.2 +/-    0.45       9.9 +/-    0.45  0.190 / 0.310
G27     65.0           35.1                6.9 +/-    1.05      11.0 +/-    1.05  0.080 / 0.220
G28     230.2          22.0                6.1 +/-    2.40      12.7 +/-    2.40  0.040 / 0.040
G30     294.1          29.0                3.5 +/-    2.57       6.2 +/-    2.57  0.040 / 0.050