PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-15:27:40
G03     188.0          20.1                9.9 +/-    1.36      21.7 +/-    1.36  0.170 / 0.240
G07     292.5          41.8               12.2 +/-    2.53      17.3 +/-    2.53  0.090 / 0.260
G08     142.4          26.3               10.8 +/-    2.50      20.6 +/-    2.50  0.040 / 0.080
G09     320.4          59.3               11.4 +/-    0.88      13.1 +/-    0.88  0.060 / 0.070
G16     44.6           44.0               10.0 +/-    0.56      13.6 +/-    0.56  0.030 / 0.030
G23     104.4          80.9                9.9 +/-    0.41      10.0 +/-    0.41  0.030 / 0.030
G26     43.7           15.3                8.6 +/-    2.27      21.2 +/-    2.27  0.060 / 0.090
G27     104.2          32.6               10.8 +/-    1.27      17.9 +/-    1.27  0.060 / 0.100
G30     272.8          12.9               11.6 +/-    5.06      30.4 +/-    5.06  0.040 / 0.020