PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-18:27:50
G07     308.2          48.8               11.0 +/-    2.23      14.1 +/-    2.23  0.080 / 0.090
G08     128.9          38.6               13.1 +/-    0.62      19.4 +/-    0.62  0.070 / 0.080
G09     311.6          75.0               12.0 +/-    0.69      12.3 +/-    0.69  0.040 / 0.020
G16     41.9           31.9                9.6 +/-    2.01      16.1 +/-    2.01  0.040 / 0.020
G23     141.4          68.1               11.9 +/-    0.55      12.7 +/-    0.55  0.080 / 0.050
G27     86.1           37.6               11.4 +/-    1.02      17.3 +/-    1.02  0.060 / 0.060
G30     283.7          20.8               11.2 +/-    2.09      24.2 +/-    2.09  0.140 / 0.260