PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/22-18:57:50
G10     247.4          25.7               13.8 +/-    1.08      26.5 +/-    1.08  0.030 / 0.060
G13     56.5           30.6                9.4 +/-    1.25      16.3 +/-    1.25  0.040 / 0.060
G15     94.3           58.0               10.4 +/-    1.24      12.0 +/-    1.24  0.070 / 0.150
G16     299.0          15.9                7.5 +/-    3.28      18.2 +/-    3.28  0.050 / 0.150
G20     266.1          49.4               11.4 +/-    4.33      14.5 +/-    4.33  0.030 / 0.040
G21     329.0          56.8               10.7 +/-    0.63      12.5 +/-    0.63  0.040 / 0.040
G26     271.7          16.8               11.5 +/-    1.72      27.4 +/-    1.72  0.150 / 0.520
G29     162.4          55.2               12.3 +/-    0.39      14.7 +/-    0.39  0.180 / 0.550