PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-19:42:40
G01     48.3           24.1                9.4 +/-    1.39      18.9 +/-    1.39  0.040 / 0.050
G06     178.3          24.9               14.1 +/-    1.42      27.6 +/-    1.42  0.040 / 0.040
G11     43.9           13.2                8.5 +/-    2.42      22.0 +/-    2.42  0.160 / 0.250
G13     247.8          30.1               13.0 +/-    1.99      22.8 +/-    1.99  0.110 / 0.230
G15     281.2          15.5                9.7 +/-    2.27      23.9 +/-    2.27  0.040 / 0.040
G17     322.1          78.4               12.0 +/-    0.56      12.2 +/-    0.56  0.060 / 0.040
G19     248.9          61.8               12.2 +/-    1.06      13.7 +/-    1.06  0.130 / 0.210
G28     48.2           55.3               11.1 +/-    1.40      13.2 +/-    1.40  0.130 / 0.160
G30     149.8          37.4               13.7 +/-    0.73      20.8 +/-    0.73  0.210 / 0.320