PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-00:42:50
G02     219.9          66.0                7.9 +/-    0.80       8.5 +/-    0.80  0.030 / 0.020
G06     49.4           70.5                6.3 +/-    0.30       6.7 +/-    0.30  0.030 / 0.020
G12     319.8          39.8                6.6 +/-    1.97       9.6 +/-    1.97  0.040 / 0.070
G17     58.4           33.5                7.1 +/-    1.43      11.5 +/-    1.43  0.060 / 0.050
G19     43.5           47.0                6.8 +/-    0.51       8.9 +/-    0.51  0.060 / 0.080
G24     259.8          40.4                9.0 +/-    4.38      13.0 +/-    4.38  0.060 / 0.100
G28     125.6          10.0                9.2 +/-    2.93      25.8 +/-    2.93  0.260 / 0.480