PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-18:42:50
G01     109.3          23.7               11.0 +/-    3.02      22.1 +/-    3.02  0.030 / 0.040
G07     106.9          54.0               11.1 +/-    0.63      13.3 +/-    0.63  0.030 / 0.030
G08     42.1           22.3                8.3 +/-    2.61      17.2 +/-    2.61  0.030 / 0.040
G09     176.1          17.5               12.2 +/-    1.60      28.4 +/-    1.60  0.030 / 0.040
G11     91.2           42.9               11.8 +/-    0.59      16.4 +/-    0.59  0.040 / 0.070
G13     311.3          27.6                8.8 +/-    1.92      16.3 +/-    1.92  0.040 / 0.070
G17     203.9          35.2               12.3 +/-    1.50      19.4 +/-    1.50  0.090 / 0.160
G18     81.2           23.4               10.4 +/-    2.59      21.2 +/-    2.59  0.090 / 0.190
G28     303.6          58.3                9.8 +/-    1.34      11.3 +/-    1.34  0.070 / 0.200
G30     20.2           77.2               11.5 +/-    0.72      11.7 +/-    0.72  0.070 / 0.180