PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/01-17:27:30
G03     228.3          67.5                8.7 +/-    1.34       9.3 +/-    1.34  0.160 / 0.590
G07     249.3          11.5                9.8 +/-    4.02      26.5 +/-    4.02  0.150 / 0.580
G09     303.8          18.6                7.9 +/-    1.16      17.9 +/-    1.16  0.040 / 0.130
G14     100.7          12.9               10.0 +/-    1.86      26.2 +/-    1.86  0.040 / 0.150
G16     134.2          58.2               10.1 +/-    0.80      11.6 +/-    0.80  0.040 / 0.130
G22     191.6          52.4               11.1 +/-    1.00      13.6 +/-    1.00  0.040 / 0.160
G23     319.0          48.7                8.1 +/-    0.95      10.4 +/-    0.95  0.060 / 0.130
G26     73.8           54.7                9.1 +/-    0.58      10.9 +/-    0.58  0.050 / 0.170
G31     52.1           21.2                5.7 +/-    0.68      12.2 +/-    0.68  0.140 / 0.420