PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-13:12:50
G01     123.0          14.9                8.2 +/-    2.42      20.3 +/-    2.42  0.050 / 0.040
G07     67.9           68.4                6.7 +/-    1.02       7.1 +/-    1.02  0.030 / 0.040
G08     46.8           34.7                6.6 +/-    0.51      10.6 +/-    0.51  0.120 / 0.250
G09     176.3          29.1                6.9 +/-    2.02      12.4 +/-    2.02  0.110 / 0.210
G11     111.7          38.0                8.1 +/-    0.64      12.3 +/-    0.64  0.040 / 0.100
G13     319.5          15.9                2.6 +/-    2.39       6.3 +/-    2.39  0.040 / 0.100
G17     200.6          20.1                6.5 +/-    1.27      14.3 +/-    1.27  0.030 / 0.060
G18     98.6           18.9                8.1 +/-    0.83      18.3 +/-    0.83  0.040 / 0.060
G28     284.3          55.3                6.8 +/-    1.15       8.1 +/-    1.15  0.030 / 0.040
G30     337.8          64.0                5.8 +/-    0.56       6.4 +/-    0.56  0.020 / 0.030