PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-01:57:30
G02     21.3           65.1                7.6 +/-    0.59       8.3 +/-    0.59  0.030 / 0.030
G05     152.8          50.6               14.2 +/-    1.46      17.7 +/-    1.46  0.030 / 0.030
G06     47.4           26.0                8.7 +/-    0.78      16.7 +/-    0.78  0.040 / 0.060
G12     240.5          79.2               10.2 +/-    0.50      10.3 +/-    0.50  0.030 / 0.050
G19     88.9           18.6               11.0 +/-    0.84      25.1 +/-    0.84  0.030 / 0.060
G24     217.0          11.7               14.3 +/-    2.78      38.4 +/-    2.78  0.030 / 0.050
G25     311.3          42.5                9.0 +/-    0.99      12.6 +/-    0.99  0.050 / 0.080
G29     297.8          18.3                7.4 +/-    0.70      17.1 +/-    0.70  0.060 / 0.080