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Дата изменения: Fri Jun 1 10:46:27 2001 Дата индексирования: Sun Dec 23 08:46:51 2007 Кодировка: Поисковые слова: п п п п п |
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SHAREABLE DATA CENTER
East-Siberian Center for the Earth's Ionosphere Research (SDC ESCEIR)Institute of Solar-Terrestial Physics SB RASUpper Atmosphere Physics and Radiowave Propagation Department |
Composition
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Short-wave ionosphere diagnostics subdivision
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Ionogram databaseStructurally, the experimental ionogram database consists of the ionogram catalogue and ionograms themselves. The ionogram catalogue is divided into the data file and the key file. The data file contains ionogram service information: sounding type, signature of the existence of ionogram in the DB, ionogram processing signature, station code, date and time. The key file contains data file record numbers sorted by date and time. By using a usual binary search, we can quickly obtain the record number for a given date and time, and thus to restore ionogram service information from data file. These data are stored in format N1 and placed on a hard drive in such a manner that the path to the ionogram gives the sounding type, date, time, and station code. Way coding structure is presented on the figure. All ionograms are stoted on the hard drive in packed form under one name source. If we have the ionogram catalogue, then we can quickly obtain information on ionogram existence and build the path to this ionogram. The ionogram structure as a single hard drive file allows the operator to carry out a database examination without any additional efforts. Processing results databaseTo store processing results we have developed the processing results database. This database is analogous to the experimental data database. The processing results DB consists of the data file, the key file and a so-called memo-file. This three-file set is intended for every kind of sounding. The data file contains service information, which is needed to search the required information (date, time, ionogram type, and so on). The key file contains key elements for data file records and can be used for a quick search. The memo-file contains variable length ionogram processing results stored in the N2 format. A minimum record size for the memo-field is 256 bytes, and a maximum size is 65000 bytes. |
Result databaseTo store prediction results and for in-line diagnostics we have developed the results DB. This DB is analogous to the results processing DB and consists of the data file, key file and memo-file. There is a three-file set for every type of sounding. The data file contains the following service information: sounding type, transmitting and receiving locations coordinates, radiorun length, transmitting angle, date, time , processing method number, ionospheric model number, electron density profile number, transmitting signal type number, transmitting antenna type number, solar activity index, three months average solar activity index, transmitter power, transmitter antenna parameters values, and receiving antenna parameters values. Also, we have file lists for descriptors which can be corrected. The key file contains data file record numbers sorted by date and time and can be used for a quick search. The memo-file contains prediction results and on-line diagnostics data in the N2 format. The memo-file allows us to store variable length information. A minimum record size for the memo-field is 256 bytes, and a maximum sizeis -- 65000 bytes. For user's convenience, we have separate memo-files for prediction results and for on-line diagnostics. Experimental data database servicingThe Figure we presents a functional diagram of the program package for storing data in the database and experimental ionogram examination and processing. The integral envelope - program "Manager", can perform the following set of operations:
The regime "ionogram catalogue display" mode gives an opportunity to display all ionograms in the DB. This mode is accomplished in the calendar form". By moving along the calendar using the arrows, we can examine the DB of date and sounding types in going from level to level. If the desired ionogram is chosen, then the operator can display it, mark to remove or process in the automatic or semi-automatic mode. Processing results are stored to the processing results DB. If in the usual ionogram display there is a sign of processing, then the operator can view processing results through ionogram superposition. |