PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-04:28:00
G08     295.6          22.5                8.7 +/-    1.17      18.1 +/-    1.17  0.080 / 0.150
G10     3.9            62.9                6.1 +/-    0.35       6.8 +/-    0.35  0.070 / 0.100
G14     228.3          42.0               10.3 +/-    1.43      14.6 +/-    1.43  0.050 / 0.110
G20     53.0           58.6                6.4 +/-    0.36       7.4 +/-    0.36  0.040 / 0.100
G21     145.8          42.8                8.2 +/-    1.05      11.4 +/-    1.05  0.030 / 0.030
G24     56.8           25.6                5.6 +/-    0.80      10.9 +/-    0.80  0.030 / 0.030
G27     256.1          32.4                9.7 +/-    1.54      16.2 +/-    1.54  0.040 / 0.080
G32     244.4          68.4                7.0 +/-    0.58       7.4 +/-    0.58  0.040 / 0.070