PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-18:12:30
G01     226.7          17.2                9.4 +/-    4.09      22.2 +/-    4.09  0.050 / 0.100
G03     280.7          70.2                9.1 +/-    0.57       9.6 +/-    0.57  0.050 / 0.100
G14     85.8           25.8               11.3 +/-    0.88      21.7 +/-    0.88  0.040 / 0.050
G16     147.6          44.7               14.0 +/-    0.98      19.0 +/-    0.98  0.040 / 0.040
G22     211.7          70.3                9.8 +/-    0.94      10.3 +/-    0.94  0.120 / 0.270
G23     308.1          38.5                8.7 +/-    1.88      12.9 +/-    1.88  0.110 / 0.210
G26     96.8           54.0               10.3 +/-    0.72      12.4 +/-    0.72  0.040 / 0.080
G31     45.3           31.7                8.7 +/-    0.82      14.7 +/-    0.82  0.030 / 0.080