PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-22:28:00
G07     46.1           68.5                9.7 +/-    1.11      10.4 +/-    1.11  0.070 / 0.060
G08     54.2           42.1                8.8 +/-    0.62      12.4 +/-    0.62  0.070 / 0.060
G09     178.8          42.8               11.6 +/-    0.93      16.2 +/-    0.93  0.130 / 0.130
G11     122.5          32.4               11.0 +/-    1.01      18.4 +/-    1.01  0.120 / 0.140
G17     198.3          10.9               -1.5 +/-   25.50      -4.0 +/-   25.50  0.030 / 0.030
G18     105.4          13.7               10.8 +/-    1.30      27.6 +/-    1.30  0.030 / 0.040
G23     161.2          14.8               11.3 +/-    2.45      28.1 +/-    2.45  0.140 / 0.250
G27     39.1           14.2                7.2 +/-    3.12      18.4 +/-    3.12  0.300 / 0.310
G28     264.2          46.8               11.3 +/-    4.27      14.9 +/-    4.27  0.040 / 0.050
G30     325.9          55.5                9.3 +/-    0.45      11.0 +/-    0.45  0.050 / 0.050