PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-21:27:40
G01     44.8           21.0               11.2 +/-    3.77      24.0 +/-    3.77  0.270 / 0.310
G06     178.1          29.1               18.7 +/-    2.42      33.3 +/-    2.42  0.260 / 0.320
G13     243.1          27.1               15.6 +/-    2.21      29.1 +/-    2.21  0.120 / 0.220
G15     276.6          14.4               11.7 +/-    1.04      29.5 +/-    1.04  0.090 / 0.190
G17     346.0          75.5               12.4 +/-    0.45      12.8 +/-    0.45  0.200 / 0.150
G19     258.4          65.2               14.6 +/-    0.97      16.0 +/-    0.97  0.160 / 0.150
G24     317.9          14.3                8.8 +/-    2.02      22.4 +/-    2.02  0.040 / 0.030
G28     56.5           53.1               11.4 +/-    0.95      13.9 +/-    0.95  0.040 / 0.040
G30     152.0          33.3               15.8 +/-    0.97      25.9 +/-    0.97  0.060 / 0.090