PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-21:27:50
G01     218.5          11.4               11.1 +/-    2.42      29.9 +/-    2.42  0.050 / 0.040
G03     269.5          69.9                8.3 +/-    1.53       8.8 +/-    1.53  0.040 / 0.040
G09     299.9          16.9                6.9 +/-    3.60      16.4 +/-    3.60  0.110 / 0.200
G14     90.6           23.3                9.6 +/-    1.73      19.5 +/-    1.73  0.120 / 0.210
G16     135.9          51.8               11.0 +/-    0.67      13.6 +/-    0.67  0.050 / 0.060
G22     206.3          64.2                8.6 +/-    0.55       9.4 +/-    0.55  0.050 / 0.060
G23     312.5          42.2              -11.5 +/-    0.93     -16.2 +/-    0.93  0.040 / 0.030
G26     84.2           54.3                8.3 +/-    0.61      10.0 +/-    0.61  0.040 / 0.030
G31     48.3           26.5                6.0 +/-    2.45      11.3 +/-    2.45  0.050 / 0.080