PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-23:28:10
G02     199.8          20.3               14.5 +/-    2.16      31.7 +/-    2.16  0.100 / 0.110
G06     175.1          49.3               13.0 +/-    1.08      16.6 +/-    1.08  0.090 / 0.100
G13     227.2          14.1               12.8 +/-    1.24      32.6 +/-    1.24  0.060 / 0.060
G17     22.5           59.6               10.8 +/-    0.80      12.3 +/-    0.80  0.060 / 0.070
G19     318.2          71.4                9.0 +/-    1.57       9.5 +/-    1.57  0.050 / 0.030
G24     309.7          30.1                8.7 +/-    1.61      15.2 +/-    1.61  0.060 / 0.030
G28     83.6           43.6               12.2 +/-    0.82      16.8 +/-    0.82  0.230 / 0.280
G30     156.7          14.8               14.6 +/-    1.32      36.5 +/-    1.32  0.220 / 0.260