PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-22:28:00
G01     37.8           10.7                8.9 +/-    3.25      24.4 +/-    3.25  0.130 / 0.160
G02     199.3          15.0               19.4 +/-    2.59      48.3 +/-    2.59  0.090 / 0.220
G06     175.7          43.9               13.5 +/-    1.40      18.6 +/-    1.40  0.080 / 0.320
G13     231.1          17.7               13.8 +/-    2.53      32.2 +/-    2.53  0.120 / 0.350
G17     15.4           64.3               10.9 +/-    0.42      11.9 +/-    0.42  0.030 / 0.030
G19     299.8          71.4               10.3 +/-    0.42      10.8 +/-    0.42  0.030 / 0.030
G24     313.0          25.9                8.1 +/-    1.37      15.6 +/-    1.37  0.170 / 0.220
G28     76.6           46.6               10.3 +/-    0.80      13.6 +/-    0.80  0.140 / 0.250
G30     155.7          19.5               13.3 +/-    1.60      29.6 +/-    1.60  0.050 / 0.070