PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-01:27:50
G01     78.8           33.3                7.1 +/-    1.00      11.6 +/-    1.00  0.040 / 0.040
G07     133.1          37.3                9.8 +/-    1.19      14.9 +/-    1.19  0.040 / 0.040
G11     61.2           37.0                5.4 +/-    0.64       8.3 +/-    0.64  0.040 / 0.050
G13     284.0          37.3                8.2 +/-    0.91      12.4 +/-    0.91  0.030 / 0.070
G15     307.6          14.1                5.4 +/-    2.08      13.8 +/-    2.08  0.070 / 0.120
G17     223.7          61.3               10.3 +/-    1.31      11.6 +/-    1.31  0.080 / 0.120
G19     219.7          36.2                9.4 +/-    2.16      14.6 +/-    2.16  0.060 / 0.130
G28     8.7            60.5                5.9 +/-    1.04       6.7 +/-    1.04  0.060 / 0.110
G30     127.6          63.5                7.7 +/-    0.84       8.5 +/-    0.84  0.040 / 0.090