PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-01:57:50
G02     7.9            72.7               11.2 +/-    0.62      11.6 +/-    0.62  0.020 / 0.030
G05     159.3          41.4               13.9 +/-    1.51      19.8 +/-    1.51  0.020 / 0.030
G06     43.7           33.9                9.6 +/-    1.44      15.5 +/-    1.44  0.040 / 0.050
G12     293.8          77.0               10.8 +/-    0.63      11.1 +/-    0.63  0.030 / 0.070
G17     90.1           11.1               10.8 +/-    1.67      29.3 +/-    1.67  0.080 / 0.120
G19     80.9           24.0               12.1 +/-    1.17      24.1 +/-    1.17  0.060 / 0.130
G24     223.4          17.9               14.6 +/-    2.81      33.8 +/-    2.81  0.150 / 0.470
G25     315.8          34.3               10.9 +/-    0.92      17.5 +/-    0.92  0.160 / 0.460
G29     291.1          12.5               11.8 +/-    2.29      31.1 +/-    2.29  0.040 / 0.040