PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-23:43:10
G01     109.5          24.3                9.9 +/-    1.58      19.6 +/-    1.58  0.060 / 0.060
G07     102.5          60.4               10.5 +/-    1.37      11.9 +/-    1.37  0.040 / 0.050
G08     42.7           24.9                7.7 +/-    1.24      15.0 +/-    1.24  0.070 / 0.090
G09     176.1          16.8               14.6 +/-    1.99      34.7 +/-    1.99  0.090 / 0.120
G11     96.7           43.2               10.0 +/-    0.86      13.8 +/-    0.86  0.070 / 0.110
G13     311.9          26.4                8.5 +/-    2.16      16.1 +/-    2.16  0.070 / 0.110
G17     205.6          33.4               11.3 +/-    1.64      18.4 +/-    1.64  0.090 / 0.160
G28     314.2          60.7                9.8 +/-    0.81      11.0 +/-    0.81  0.080 / 0.160
G30     32.3           77.3               10.1 +/-    0.72      10.3 +/-    0.72  0.040 / 0.080