PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-21:58:00
G01     77.3           33.3               16.7 +/-    1.48      27.3 +/-    1.48  0.120 / 0.240
G07     134.0          36.4               19.3 +/-    1.04      29.8 +/-    1.04  0.090 / 0.260
G11     59.4           35.7               15.4 +/-    1.03      24.1 +/-    1.03  0.060 / 0.110
G13     281.9          37.6               16.2 +/-    1.39      24.5 +/-    1.39  0.100 / 0.100
G15     307.0          14.2               14.5 +/-    3.41      36.7 +/-    3.41  0.040 / 0.070
G17     224.9          59.5               19.4 +/-    1.72      22.1 +/-    1.72  0.040 / 0.070
G18     54.0           21.0               13.3 +/-    4.78      28.7 +/-    4.78  0.310 / 0.280
G19     220.5          36.4               20.5 +/-    1.65      31.7 +/-    1.65  0.380 / 0.220
G28     10.7           60.3               17.4 +/-    1.38      19.7 +/-    1.38  0.030 / 0.040
G30     129.0          64.7               19.0 +/-    0.37      20.7 +/-    0.37  0.030 / 0.030