PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-23:43:10
G01     43.2           19.1                7.9 +/-    2.37      17.7 +/-    2.37  0.180 / 0.270
G06     176.1          35.0               12.1 +/-    1.11      19.2 +/-    1.11  0.240 / 0.290
G13     241.4          24.4               12.5 +/-    1.55      24.7 +/-    1.55  0.070 / 0.300
G15     273.9          13.6                9.8 +/-    1.77      25.1 +/-    1.77  0.180 / 0.220
G17     338.6          74.6                9.7 +/-    0.33      10.0 +/-    0.33  0.210 / 0.480
G19     266.7          66.7                9.8 +/-    0.98      10.6 +/-    0.98  0.260 / 0.280
G24     317.7          16.0                8.1 +/-    2.74      19.6 +/-    2.74  0.090 / 0.130
G28     67.3           48.3                9.1 +/-    1.80      11.7 +/-    1.80  0.090 / 0.130
G30     152.9          29.0               13.3 +/-    0.95      23.8 +/-    0.95  0.070 / 0.120