PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-14:28:10
G02     202.0          26.8               10.3 +/-    1.85      19.2 +/-    1.85  0.040 / 0.030
G03     65.0           9.4               -15.6 +/-   17.06     -44.0 +/-   17.06  0.050 / 0.040
G06     167.9          61.7               11.0 +/-    0.64      12.3 +/-    0.64  0.040 / 0.020
G17     32.9           51.8                8.4 +/-    1.16      10.4 +/-    1.16  0.030 / 0.030
G19     352.4          68.0                7.4 +/-    0.42       7.9 +/-    0.42  0.100 / 0.080
G24     305.7          33.3                6.7 +/-    2.41      11.0 +/-    2.41  0.070 / 0.100
G28     96.7           34.8                9.5 +/-    0.76      15.1 +/-    0.76  0.090 / 0.150