PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/26-19:57:40
G07     307.4          48.2                9.9 +/-    2.11      12.8 +/-    2.11  0.070 / 0.070
G08     128.4          38.8               12.5 +/-    0.70      18.5 +/-    0.70  0.040 / 0.090
G09     311.4          75.5                9.9 +/-    0.57      10.2 +/-    0.57  0.030 / 0.020
G16     41.9           31.3                7.9 +/-    1.17      13.5 +/-    1.17  0.030 / 0.030
G23     141.5          68.7               11.6 +/-    0.47      12.3 +/-    0.47  0.070 / 0.070
G27     86.5           37.7               10.7 +/-    1.18      16.2 +/-    1.18  0.050 / 0.060
G30     283.4          20.2                9.8 +/-    1.12      21.4 +/-    1.12  0.090 / 0.120