PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-20:27:50
G01     45.4           21.5               10.2 +/-    0.86      21.5 +/-    0.86  0.040 / 0.040
G06     175.8          32.3               16.3 +/-    1.07      27.3 +/-    1.07  0.060 / 0.060
G11     43.7           10.5                9.7 +/-    1.64      26.7 +/-    1.64  0.160 / 0.600
G13     244.3          26.6               17.5 +/-    1.90      32.9 +/-    1.90  0.180 / 0.440
G15     278.1          14.3               13.1 +/-    1.74      33.1 +/-    1.74  0.160 / 0.240
G17     328.9          76.2               14.2 +/-    0.73      14.6 +/-    0.73  0.140 / 0.250
G19     257.3          63.4               14.5 +/-    1.13      16.0 +/-    1.13  0.050 / 0.090
G24     318.3          13.6                8.8 +/-    1.56      22.7 +/-    1.56  0.060 / 0.100
G28     62.1           50.1               13.0 +/-    0.76      16.4 +/-    0.76  0.060 / 0.160
G30     152.2          34.1               16.4 +/-    1.41      26.5 +/-    1.41  0.060 / 0.170