PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-00:13:10
G02     199.6          18.5               11.2 +/-    1.72      25.6 +/-    1.72  0.080 / 0.120
G06     176.2          46.7               10.7 +/-    0.75      14.1 +/-    0.75  0.090 / 0.090
G13     228.6          15.3               11.3 +/-    1.55      27.8 +/-    1.55  0.050 / 0.080
G17     20.8           60.9                8.5 +/-    0.73       9.5 +/-    0.73  0.050 / 0.060
G19     311.0          71.4                7.6 +/-    0.91       8.0 +/-    0.91  0.040 / 0.030
G24     310.7          29.0                7.0 +/-    1.66      12.6 +/-    1.66  0.030 / 0.030
G28     81.5           44.4                9.6 +/-    1.28      13.0 +/-    1.28  0.090 / 0.150
G30     156.6          16.9               11.9 +/-    1.60      28.3 +/-    1.60  0.120 / 0.180