PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-01:28:00
G07     38.2           69.6                4.7 +/-    1.10       5.0 +/-    1.10  0.110 / 0.090
G08     55.1           44.0                5.0 +/-    0.95       6.8 +/-    0.95  0.090 / 0.070
G09     179.6          42.0                6.5 +/-    0.54       9.2 +/-    0.54  0.020 / 0.030
G11     124.9          31.8                6.2 +/-    0.93      10.5 +/-    0.93  0.030 / 0.030
G17     199.7          10.3               -7.7 +/-    5.98     -21.3 +/-    5.98  0.050 / 0.030
G23     160.5          11.7                6.0 +/-    1.67      16.2 +/-    1.67  0.040 / 0.030
G27     37.7           10.1                2.3 +/-    4.87       6.4 +/-    4.87  0.050 / 0.060
G28     270.2          50.9                4.9 +/-    3.32       6.1 +/-    3.32  0.050 / 0.070
G30     332.2          59.3                2.9 +/-    0.48       3.3 +/-    0.48  0.170 / 0.580