PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-23:13:00
G10     263.2          37.2               11.4 +/-    2.21      17.4 +/-    2.21  0.180 / 0.300
G13     43.4           20.1                8.5 +/-    2.26      18.7 +/-    2.26  0.150 / 0.270
G15     63.5           51.4               10.1 +/-    1.09      12.6 +/-    1.09  0.130 / 0.520
G16     283.1          13.6                8.2 +/-    1.91      21.0 +/-    1.91  0.140 / 0.520
G20     290.4          58.2               10.4 +/-    1.30      12.0 +/-    1.30  0.050 / 0.040
G21     353.1          68.7               10.0 +/-    0.67      10.7 +/-    0.67  0.040 / 0.040
G24     124.6          11.9               11.1 +/-    2.56      29.7 +/-    2.56  0.090 / 0.180
G27     320.6          15.2                8.1 +/-    1.09      20.0 +/-    1.09  0.110 / 0.210
G29     166.3          35.1               11.8 +/-    0.50      18.7 +/-    0.50  0.030 / 0.040