PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-06:43:00
G10     294.9          51.5                5.6 +/-    2.18       6.9 +/-    2.18  0.080 / 0.090
G15     46.3           29.0                4.2 +/-    1.02       7.4 +/-    1.02  0.080 / 0.100
G20     347.2          65.3                5.6 +/-    0.57       6.1 +/-    0.57  0.040 / 0.030
G21     91.2           74.1                6.1 +/-    0.33       6.3 +/-    0.33  0.040 / 0.030
G24     99.3           25.5                7.7 +/-    1.43      14.8 +/-    1.43  0.120 / 0.060
G27     304.4          32.2                4.0 +/-    0.99       6.7 +/-    0.99  0.060 / 0.070
G32     210.3          25.3                8.3 +/-    1.99      16.2 +/-    1.99  0.110 / 0.110