PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-19:28:00
G07     310.1          47.8               12.0 +/-    0.55      15.6 +/-    0.55  0.040 / 0.060
G08     129.6          42.3               17.0 +/-    0.33      23.9 +/-    0.33  0.050 / 0.070
G09     292.1          80.4               10.9 +/-    0.56      11.1 +/-    0.56  0.030 / 0.040
G16     42.4           21.0               11.6 +/-    2.22      25.0 +/-    2.22  0.030 / 0.040
G23     145.9          57.0               15.4 +/-    0.76      18.0 +/-    0.76  0.030 / 0.030
G27     74.1           36.8               14.2 +/-    0.54      21.8 +/-    0.54  0.020 / 0.030
G28     226.0          15.9               15.0 +/-    9.80      36.6 +/-    9.80  0.420 / 0.490
G30     289.6          26.4               12.2 +/-    1.59      23.1 +/-    1.59  0.120 / 0.230