PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-18:57:40
G02     219.8          62.4               12.1 +/-    1.36      13.5 +/-    1.36  0.060 / 0.080
G06     49.5           69.3               11.0 +/-    0.49      11.6 +/-    0.49  0.080 / 0.080
G12     320.6          42.6               11.2 +/-    0.72      15.7 +/-    0.72  0.030 / 0.030
G17     60.3           30.2               11.4 +/-    0.94      19.8 +/-    0.94  0.040 / 0.020
G19     40.6           48.9               10.0 +/-    1.11      12.7 +/-    1.11  0.040 / 0.050
G24     258.9          40.7               13.3 +/-    4.37      19.1 +/-    4.37  0.030 / 0.060
G28     125.0          10.9               12.6 +/-    3.10      34.5 +/-    3.10  0.030 / 0.040