PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-20:13:00
G01     39.1           13.4               10.4 +/-    1.14      27.0 +/-    1.14  0.040 / 0.080
G02     199.3          11.2                8.6 +/-   24.12      23.4 +/-   24.12  0.040 / 0.070
G06     175.2          41.0               18.5 +/-    0.67      26.5 +/-    0.67  0.090 / 0.190
G13     233.9          20.2               17.8 +/-    1.30      38.9 +/-    1.30  0.110 / 0.200
G15     267.0          11.0               14.1 +/-    3.21      38.4 +/-    3.21  0.090 / 0.160
G17     7.9            68.0               15.8 +/-    0.88      16.9 +/-    0.88  0.070 / 0.150
G19     288.4          70.9               16.0 +/-    0.78      16.9 +/-    0.78  0.260 / 0.610
G24     314.9          22.4               10.0 +/-    1.07      20.8 +/-    1.07  0.300 / 0.440
G28     71.2           48.8               15.0 +/-    0.50      19.2 +/-    0.50  0.060 / 0.070
G30     154.7          22.0               17.7 +/-    2.25      37.0 +/-    2.25  0.060 / 0.070