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                9.8 +/-    1.91      23.1 +/-    1.91  0.040 / 0.030
G03     280.7          70.2                9.3 +/-    0.69       9.8 +/-    0.69  0.040 / 0.040
G14     85.8           25.8                9.5 +/-    1.04      18.3 +/-    1.04  0.100 / 0.170
G16     147.6          44.7               11.7 +/-    1.13      15.8 +/-    1.13  0.130 / 0.230
G22     211.7          70.3                9.1 +/-    0.95       9.6 +/-    0.95  0.040 / 0.060
G23     308.1          38.5                8.1 +/-    1.73      12.1 +/-    1.73  0.030 / 0.050
G26     96.8           54.0                9.1 +/-    0.60      10.9 +/-    0.60  0.080 / 0.080
G31     45.3           31.7                8.6 +/-    1.57      14.5 +/-    1.57  0.060 / 0.070