PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-04:28:10
G01     80.0           33.1                4.5 +/-    0.69       7.4 +/-    0.69  0.040 / 0.080
G07     132.4          35.6                6.0 +/-    0.80       9.5 +/-    0.80  0.040 / 0.080
G11     58.3           34.5                2.2 +/-    0.90       3.6 +/-    0.90  0.080 / 0.220
G13     283.9          38.2                4.2 +/-    1.00       6.3 +/-    1.00  0.080 / 0.220
G15     310.1          12.4                1.5 +/-    1.87       3.9 +/-    1.87  0.080 / 0.120
G17     221.7          64.9                5.7 +/-    0.54       6.2 +/-    0.54  0.100 / 0.130
G18     52.6           19.4                2.8 +/-    1.41       6.3 +/-    1.41  0.030 / 0.060
G19     218.7          32.9                5.8 +/-    0.96       9.5 +/-    0.96  0.040 / 0.070
G28     0.7            61.3                2.7 +/-    0.59       3.0 +/-    0.59  0.030 / 0.040
G30     124.6          70.7                5.3 +/-    0.64       5.6 +/-    0.64  0.030 / 0.040