PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-20:57:50
G03     189.4          20.5               13.2 +/-    1.68      28.8 +/-    1.68  0.040 / 0.080
G07     288.7          36.3               11.5 +/-    1.78      17.8 +/-    1.78  0.040 / 0.080
G08     144.7          26.0               13.6 +/-    2.08      26.0 +/-    2.08  0.080 / 0.120
G09     320.3          60.2               11.5 +/-    0.42      13.0 +/-    0.42  0.060 / 0.160
G16     43.2           40.9               10.0 +/-    0.66      14.3 +/-    0.66  0.050 / 0.080
G23     111.0          79.1                9.9 +/-    0.76      10.1 +/-    0.76  0.040 / 0.070
G26     43.3           12.3                8.4 +/-    0.60      22.3 +/-    0.60  0.080 / 0.190
G27     100.1          33.2               12.8 +/-    0.60      21.0 +/-    0.60  0.130 / 0.190
G30     274.1          15.2               12.1 +/-    1.72      30.1 +/-    1.72  0.030 / 0.030