PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-20:27:50
G01     109.4          24.4               14.5 +/-    1.41      28.8 +/-    1.41  0.260 / 0.090
G07     102.7          60.4               12.7 +/-    0.85      14.4 +/-    0.85  0.160 / 0.040
G08     42.8           26.0                9.8 +/-    3.16      18.8 +/-    3.16  0.090 / 0.060
G09     175.8          16.3               14.8 +/-    1.80      35.8 +/-    1.80  0.110 / 0.050
G11     94.6           43.0               12.8 +/-    1.13      17.7 +/-    1.13  0.090 / 0.150
G13     311.6          26.8               11.1 +/-    2.09      20.7 +/-    2.09  0.070 / 0.140
G17     206.3          31.0               14.1 +/-    2.05      24.2 +/-    2.05  0.020 / 0.010
G18     83.5           24.0               11.9 +/-    1.54      23.8 +/-    1.54  0.020 / 0.010
G28     314.1          60.7               11.1 +/-    0.88      12.5 +/-    0.88  0.050 / 0.020
G30     23.1           77.2               11.9 +/-    0.71      12.2 +/-    0.71  0.040 / 0.010