PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-13:57:50
G08     310.4          18.0                4.1 +/-    1.12       9.5 +/-    1.12  0.070 / 0.120
G10     332.9          60.1                3.5 +/-    0.50       3.9 +/-    0.50  0.080 / 0.160
G14     218.9          30.5                4.6 +/-    1.66       7.9 +/-    1.66  0.060 / 0.070
G21     135.1          53.3                6.6 +/-    0.99       8.1 +/-    0.99  0.040 / 0.060
G24     73.7           30.3                5.5 +/-    0.54       9.6 +/-    0.54  0.050 / 0.080
G27     272.3          37.4                6.7 +/-    1.02      10.2 +/-    1.02  0.040 / 0.090
G32     224.4          53.7                6.3 +/-    1.26       7.6 +/-    1.26  0.100 / 0.160