PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/05-19:43:10
G07     357.4          65.1               16.4 +/-    0.67      17.9 +/-    0.67  0.090 / 0.160
G09     182.6          58.5               17.8 +/-    0.27      20.5 +/-    0.27  0.090 / 0.160
G11     137.8          22.0               18.3 +/-    2.40      38.5 +/-    2.40  0.040 / 0.040
G23     157.9          23.3               18.7 +/-    2.16      38.1 +/-    2.16  0.040 / 0.040
G27     43.7           22.1               12.0 +/-    2.22      25.1 +/-    2.22  0.070 / 0.060
G28     251.0          40.9               19.6 +/-    1.91      28.1 +/-    1.91  0.070 / 0.070
G30     315.8          47.1               15.8 +/-    0.85      20.6 +/-    0.85  0.060 / 0.080