PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-14:12:30
G07     251.6          14.7                8.4 +/-    1.58      21.0 +/-    1.58  0.040 / 0.080
G09     304.9          19.7                7.7 +/-    1.03      17.1 +/-    1.03  0.050 / 0.060
G14     102.5          11.4                8.3 +/-    2.17      22.4 +/-    2.17  0.170 / 0.190
G16     127.4          60.3               11.6 +/-    0.71      13.2 +/-    0.71  0.070 / 0.200
G22     188.0          48.1                9.7 +/-    2.18      12.5 +/-    2.18  0.040 / 0.070
G23     322.1          52.1                9.7 +/-    0.92      11.9 +/-    0.92  0.060 / 0.080
G26     67.0           51.8                8.6 +/-    0.33      10.6 +/-    0.33  0.140 / 0.240
G31     54.0           17.4                7.9 +/-    0.56      18.5 +/-    0.56  0.120 / 0.250