PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-20:27:50
G01     114.6          21.1               14.5 +/-    2.73      31.0 +/-    2.73  0.090 / 0.060
G07     91.8           64.1               13.6 +/-    0.56      14.9 +/-    0.56  0.080 / 0.050
G08     44.3           31.0               11.3 +/-    1.55      19.3 +/-    1.55  0.160 / 0.090
G09     176.8          21.6               15.1 +/-    1.22      32.1 +/-    1.22  0.130 / 0.100
G11     102.5          41.8               13.9 +/-    0.74      19.6 +/-    0.74  0.110 / 0.150
G13     315.2          22.9               10.4 +/-    1.31      21.4 +/-    1.31  0.120 / 0.180
G17     204.4          25.6               15.1 +/-    3.02      29.2 +/-    3.02  0.030 / 0.010
G18     89.5           22.6               11.1 +/-    1.50      22.9 +/-    1.50  0.030 / 0.010
G28     303.1          59.3               11.7 +/-    1.05      13.4 +/-    1.05  0.050 / 0.020
G30     3.9            73.9               13.9 +/-    0.80      14.4 +/-    0.80  0.050 / 0.020