PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-23:57:50
G02     276.9          81.1               10.6 +/-    0.68      10.7 +/-    0.68  0.050 / 0.040
G05     168.1          23.0               16.5 +/-    3.16      33.8 +/-    3.16  0.050 / 0.040
G06     38.9           54.1               10.4 +/-    0.42      12.5 +/-    0.42  0.090 / 0.150
G12     320.2          56.2               11.5 +/-    0.67      13.5 +/-    0.67  0.080 / 0.140
G17     76.6           17.6               10.2 +/-    1.29      23.7 +/-    1.29  0.120 / 0.210
G19     63.9           33.8               11.5 +/-    2.12      18.6 +/-    2.12  0.110 / 0.160
G24     237.0          30.2               15.3 +/-    1.92      26.6 +/-    1.92  0.060 / 0.030
G25     317.3          18.9                8.2 +/-    3.10      18.7 +/-    3.10  0.060 / 0.040