PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/14-12:43:00
G01     121.5          15.9                5.5 +/-    0.83      13.5 +/-    0.83  0.030 / 0.050
G07     77.6           65.4                4.3 +/-    0.80       4.6 +/-    0.80  0.030 / 0.040
G08     45.8           32.3                3.7 +/-    0.66       6.2 +/-    0.66  0.120 / 0.550
G09     175.5          27.0                6.2 +/-    2.34      11.5 +/-    2.34  0.130 / 0.470
G11     107.7          37.3                5.5 +/-    1.43       8.3 +/-    1.43  0.030 / 0.040
G13     319.9          15.1                1.8 +/-    3.35       4.4 +/-    3.35  0.040 / 0.040
G17     200.3          23.8                4.9 +/-    1.50       9.9 +/-    1.50  0.140 / 0.190
G28     287.7          56.1                3.5 +/-    0.83       4.1 +/-    0.83  0.160 / 0.200
G30     338.5          64.1                2.7 +/-    0.92       2.9 +/-    0.92  0.070 / 0.190