PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-17:58:00
G03     249.8          70.8               10.1 +/-    0.64      10.6 +/-    0.64  0.140 / 0.300
G09     299.9          14.0                6.3 +/-    1.40      16.0 +/-    1.40  0.130 / 0.260
G14     95.3           17.1               11.8 +/-    2.17      28.0 +/-    2.17  0.170 / 0.310
G16     142.3          52.4               12.7 +/-    0.67      15.5 +/-    0.67  0.130 / 0.290
G22     197.1          59.9               11.9 +/-    0.33      13.5 +/-    0.33  0.040 / 0.040
G23     313.8          43.3                8.7 +/-    0.90      12.0 +/-    0.90  0.040 / 0.040
G26     87.5           56.8               10.9 +/-    0.89      12.7 +/-    0.89  0.030 / 0.040
G31     48.6           27.0                7.1 +/-    1.72      13.2 +/-    1.72  0.040 / 0.040