PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-15:28:00
G01     80.4           33.2               11.6 +/-    0.72      19.0 +/-    0.72  0.040 / 0.030
G07     132.2          38.3               12.7 +/-    1.01      18.9 +/-    1.01  0.030 / 0.030
G11     59.8           35.5               10.2 +/-    0.66      16.1 +/-    0.66  0.100 / 0.090
G13     284.5          37.8               10.9 +/-    0.49      16.4 +/-    0.49  0.060 / 0.120
G15     311.1          11.8                8.1 +/-    1.26      21.7 +/-    1.26  0.040 / 0.050
G17     222.0          61.3               12.6 +/-    0.81      14.2 +/-    0.81  0.050 / 0.070
G18     55.6           21.5                7.4 +/-    1.67      15.8 +/-    1.67  0.050 / 0.080
G19     218.9          31.9               13.0 +/-    1.47      21.9 +/-    1.47  0.050 / 0.080
G28     4.8            60.9               11.1 +/-    0.52      12.5 +/-    0.52  0.050 / 0.130
G30     124.2          70.2               11.5 +/-    0.76      12.1 +/-    0.76  0.050 / 0.110