PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-23:57:40
G02     220.0          65.7               12.2 +/-    0.76      13.2 +/-    0.76  0.040 / 0.080
G06     49.2           70.1                9.1 +/-    0.26       9.7 +/-    0.26  0.030 / 0.060
G12     319.9          40.2                9.2 +/-    0.91      13.3 +/-    0.91  0.070 / 0.090
G17     58.8           33.0                7.9 +/-    0.90      13.1 +/-    0.90  0.060 / 0.090
G19     43.3           47.2                8.5 +/-    0.38      11.2 +/-    0.38  0.050 / 0.050
G24     259.6          40.4               11.7 +/-    0.76      16.9 +/-    0.76  0.040 / 0.050
G28     125.6          10.0               14.0 +/-    2.15      39.1 +/-    2.15  0.150 / 0.490