PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/07-13:43:10
G10     246.3          25.1                5.1 +/-    0.82      10.0 +/-    0.82  0.030 / 0.040
G13     57.7           31.1                4.7 +/-    1.56       8.0 +/-    1.56  0.030 / 0.040
G15     90.6           56.4                6.8 +/-    1.06       8.0 +/-    1.06  0.040 / 0.050
G16     300.0          15.9                2.0 +/-    7.13       4.8 +/-    7.13  0.030 / 0.050
G20     266.1          50.5                6.9 +/-    2.83       8.7 +/-    2.83  0.170 / 0.480
G21     329.7          57.1                3.7 +/-    0.38       4.3 +/-    0.38  0.180 / 0.440
G26     273.6          17.1                4.2 +/-    3.69      10.0 +/-    3.69  0.060 / 0.100
G29     162.0          57.1                7.6 +/-    0.60       8.9 +/-    0.60  0.060 / 0.100