PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-15:42:30
G02     51.3           39.5                8.0 +/-    0.48      11.7 +/-    0.48  0.030 / 0.030
G05     87.4           70.0                9.0 +/-    0.45       9.6 +/-    0.45  0.020 / 0.030
G12     188.7          45.3               11.4 +/-    1.72      15.3 +/-    1.72  0.030 / 0.080
G20     203.4          47.2               11.3 +/-    2.44      14.8 +/-    2.44  0.050 / 0.060
G21     263.5          13.0                8.9 +/-    4.29      23.1 +/-    4.29  0.190 / 0.440
G25     253.2          57.7               11.0 +/-    0.78      12.7 +/-    0.78  0.180 / 0.440
G29     325.4          50.1                8.6 +/-    1.12      10.8 +/-    1.12  0.040 / 0.050