Abstract: A ground control point device includes an SAR wave reflector configured to receive an SAR wave incident from an SAR in an incident direction and to reflect the SAR wave in the incident direction; a GNSS receiver configured to receive a GNSS wave to generate, based on the GNSS wave, time information and positional information indicative of a position of a control point; an SAR wave receiver configured to receive the SAR wave; and a control point data generator/transmitter configured to generate control point data obtained by associating the positional information when the SAR receiver receives the SAR wave with a time instant of reception of the SAR wave that is determined based on the time information, and to transmit the control point data to outside.

Abstract: A ground control point device 100 is set up at a control point of a Synthetic Aperture Radar (SAR) geodetic system in which SAR analysis. The ground control point device 100 comprises an SAR microwave reflector 10 configured to reflect an SAR microwave incident from an SAR toward an incident direction, a Global Navigation Satellite System (GNSS) receiver 20 configured to receive a GNSS wave to generate, based on the GNSS wave, positional information, which indicates a position of the control point, a ground state detector 30 configured to detect a state of a ground under the control point, the state including at least a moisture content rate of the ground, and a control point data transmitter 40 configured to transmit, to outside, control point data, which includes the positional information and a detection value of the ground state detector 30.

Abstract: A ground control point device includes an SAR wave reflector configured to receive an SAR wave incident from an SAR in an incident direction and to reflect the SAR wave in the incident direction; a GNSS receiver configured to receive a GNSS wave to generate, based on the GNSS wave, time information and positional information indicative of a position of a control point; an SAR wave receiver configured to receive the SAR wave; and a control point data generator/transmitter configured to generate control point data obtained by associating the positional information when the SAR receiver receives the SAR wave with a time instant of reception of the SAR wave that is determined based on the time information, and to transmit the control point data to outside.

Abstract: A ground control point device 100 is set up at a control point of a Synthetic Aperture Radar (SAR) geodetic system in which SAR analysis. The ground control point device 100 comprises an SAR microwave reflector 10 configured to reflect an SAR microwave incident from an SAR toward an incident direction, a Global Navigation Satellite System (GNSS) receiver 20 configured to receive a GNSS wave to generate, based on the GNSS wave, positional information, which indicates a position of the control point, a ground state detector 30 configured to detect a state of a ground under the control point, the state including at least a moisture content rate of the ground, and a control point data transmitter 40 configured to transmit, to outside, control point data, which includes the positional information and a detection value of the ground state detector 30.

Abstract: A fault tolerant circuit includes a circuit section, a detecting circuit, and a reconstructing circuit. The circuit section has a plurality of circuit sections provided to execute a plurality of functions Each of the plurality of functions has a pre-determined priority. The detecting circuit detects whether or not a part of the plurality of circuit sections is failed. The reconstructing circuit controls a remaining part of the circuit section other than the failed part of the plurality or circuit sections to execute a part of the plurality of functions selected based on the pre-determined priorities when the detecting circuit detects that the part of the plurality of circuit sections is failed.

Abstract: To enable positional information to be provided even if a signal intensity of a received GPS signal is low by compensating a phase inversion of a navigation message and performing a phase integration over a long period. A base station 20 continuously receives the GPS signal 11 and extracts therefrom information for supporting reception and positioning computation in a GPS receiver 30 and retains the information. The base station 20 transmits the support information to the GPS receiver 30 via a communication line 40 when the GPS receiver needs the information. The base station 20 supports reception time synchronization in the GPS receiver 30. The GPS receiver 30 receives the GPS signal 11, generates an intermediate frequency signal through down-conversion, and then stores an A/D conversion data in a memory unit.

Abstract: To enable positional information to be provided even if a signal intensity of a received GPS signal is low by compensating a phase inversion of a navigation message and performing a phase integration over a long period. A base station 20 continuously receives the GPS signal 11 and extracts therefrom information for supporting reception and positioning computation in a GPS receiver 30 and retains the information. The base station 20 transmits the support information to the GPS receiver 30 via a communication line 40 when the GPS receiver needs the information. The base station 20 supports reception time synchronization in the GPS receiver 30. The GPS receiver 30 receives the GPS signal 11, generates an intermediate frequency signal through down-conversion, and then stores an A/D conversion data in a memory unit.

Abstract: An apparatus for shielding against charged particles enables the performance of electronic equipment to be fully exerted and the manufacturing cost thereof to be reduced; it also permits a wide range of applications. In the apparatus for shielding against charged particles, an equipment cabinet (12) which includes electronic circuits is constructed by an electronic cabinet having a shielding layer (13) for blocking charged particles coming from outside the equipment cabinet (12) into the equipment cabinet (12). A capacitor (18) for generating an electric field (L) directed from inside the equipment cabinet (12) to outside the equipment cabinet (12) is embedded in the shielding layer (13) of the equipment cabinet (12).

Abstract: A first error correcting code and a first parity bit associated with a data word are transmitted to an external circuit. Through the external circuit the data word, the first error correcting code and the first parity bit are received and a second error correcting code and a second parity bit associated with the received data word are generated based upon the received data word. An error correction signal is generated when difference between the first and second error correcting codes is found. A parity error signal is generated when the first and second parity bits are different. The error of the received data word is corrected by the error correction circuit only in a case that the error correction signal and the parity error signal are generated. The error correction circuit outputs the received data word without error correction in other cases.