PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-04:57:50
G01     102.2          27.9                6.0 +/-    0.96      10.9 +/-    0.96  0.040 / 0.040
G07     113.6          54.1                5.8 +/-    0.48       7.0 +/-    0.48  0.040 / 0.050
G08     41.7           16.3                3.0 +/-    2.35       7.2 +/-    2.35  0.170 / 0.150
G09     174.3          10.1                1.8 +/-    3.36       4.9 +/-    3.36  0.130 / 0.220
G11     83.5           42.3                4.8 +/-    0.88       6.7 +/-    0.88  0.050 / 0.060
G13     306.7          30.3                5.0 +/-    1.46       8.8 +/-    1.46  0.040 / 0.060
G17     207.9          43.5                7.9 +/-    0.93      10.8 +/-    0.93  0.200 / 0.300
G19     210.3          18.3                4.4 +/-    1.10      10.1 +/-    1.10  0.190 / 0.340
G28     328.9          61.7                3.4 +/-    0.56       3.8 +/-    0.56  0.050 / 0.100
G30     57.6           78.9                5.3 +/-    1.54       5.4 +/-    1.54  0.060 / 0.090