PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-07:58:00
G01     93.8           30.8                4.7 +/-    0.72       8.0 +/-    0.72  0.040 / 0.040
G07     122.6          47.1                6.4 +/-    1.56       8.3 +/-    1.56  0.040 / 0.060
G11     72.3           40.0                3.6 +/-    0.65       5.2 +/-    0.65  0.030 / 0.050
G13     299.7          33.7                4.6 +/-    1.05       7.5 +/-    1.05  0.040 / 0.060
G17     212.0          52.3                8.0 +/-    0.59       9.9 +/-    0.59  0.060 / 0.050
G19     213.1          25.6                8.9 +/-    2.17      17.2 +/-    2.17  0.050 / 0.050
G28     344.2          61.8                2.0 +/-    0.59       2.2 +/-    0.59  0.070 / 0.130
G30     90.5           77.7                4.3 +/-    0.55       4.4 +/-    0.55  0.060 / 0.120