PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-16:42:50
G01     42.0           17.1                7.5 +/-    0.95      17.8 +/-    0.95  0.030 / 0.040
G06     175.0          37.8               11.4 +/-    1.19      17.2 +/-    1.19  0.040 / 0.040
G13     240.9          23.2               10.3 +/-    1.50      20.9 +/-    1.50  0.060 / 0.100
G15     275.7          12.7               11.9 +/-    2.01      31.2 +/-    2.01  0.050 / 0.120
G17     5.4            70.0               10.7 +/-    0.87      11.3 +/-    0.87  0.100 / 0.180
G19     277.8          70.2                9.7 +/-    0.54      10.2 +/-    0.54  0.110 / 0.200
G24     317.7          16.5                8.4 +/-    4.73      20.2 +/-    4.73  0.180 / 0.310
G28     69.8           47.5                9.4 +/-    0.50      12.2 +/-    0.50  0.160 / 0.250
G30     154.5          31.3               11.6 +/-    0.68      19.7 +/-    0.68  0.100 / 0.330