Yamagawa.     yg TEC   glat = 29.2 glon =129.6
Date of issue: 2025.04.02 Time:14UT
YYMMDD|UT 0    1    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16   17   18   19   20   21   22   23
--------------------------------------------------------------------------------------------------------------------------------
250401  536  652  789  933 1056 1026  929  877  782  685  614  565  518  448  507  448  373  350  270  201  168  184  297  416
250402  511  618  757  912 1026 1051  990  890  791  705  626  560  512  481  456  430  399  357  295  226  189  218  305  411