PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-20:27:30
G01     37.2           9.5                 7.7 +/-    4.18      21.7 +/-    4.18  0.060 / 0.060
G02     199.5          15.9               16.2 +/-    1.91      39.5 +/-    1.91  0.050 / 0.070
G06     174.1          46.4               14.2 +/-    0.76      18.8 +/-    0.76  0.090 / 0.170
G13     230.0          16.8               14.1 +/-    1.51      33.6 +/-    1.51  0.090 / 0.130
G17     15.4           64.0               11.6 +/-    0.80      12.8 +/-    0.80  0.120 / 0.200
G19     305.7          71.8               11.6 +/-    0.65      12.1 +/-    0.65  0.110 / 0.170
G24     312.6          26.3                9.9 +/-    1.19      18.8 +/-    1.19  0.040 / 0.030
G28     77.8           46.4               12.6 +/-    0.69      16.7 +/-    0.69  0.040 / 0.030
G30     155.6          17.3               14.6 +/-    1.57      34.3 +/-    1.57  0.160 / 0.220