Abstract:
A reception apparatus includes a first determination unit to determine whether a state exists in which timing information and six orbital elements information can be obtained from GPS signals transmitted by only two GPS satellites. When the state exists, a calculation unit calculates a trajectory line having a predetermined width on a surface of the earth, based on the GPS signals transmitted by the two satellites. A second determination unit determines whether the trajectory line traverses a district of use stored by the apparatus. A time correcting unit obtains a current time using the obtained timing information, by correcting the timing information based on a time zone corresponding to the district of use, when the trajectory line traverses the district of use. The time correcting unit does not obtain the current time using the obtained timing information when the trajectory line does not traverse the district of use.
Abstract:
A wireless synchronous system includes an apparatus and a sensor device. The apparatus has a radio communication unit for performing synchronous communication with an external apparatus. The apparatus generates a radio synchronizing signal having a predetermined cycle synchronized with the synchronous communication and determines a timing of controlling the apparatus based on the radio synchronizing signal. The sensor device has a radio communication unit for performing synchronous communication with the external apparatus. The sensor generates a radio synchronizing signal having a predetermined cycle being synchronized with the synchronous communication, obtains detection-data representing a state of the sensor device, and determines a timing of obtaining the detection-data in accordance with the radio synchronizing signal.
Abstract:
Plural image pickup apparatuses can take images in accurate synchronization. An image pickup apparatus is provided with an image pickup unit for obtaining image data, a communication unit for communicating with another image pickup apparatus in synchronization, a synchronous signal generating unit for generating a synchronous signal having a predetermined cycle and synchronized with a timing of a synchronous operation by the communication unit, an image-pickup synchronous signal generating unit for generating an image-pickup synchronous signal having a predetermined cycle and synchronized with the synchronous signal generated by the synchronous signal generating unit, and an image-pickup controlling unit for determining in accordance with the image-pickup synchronous signal generated by the image-pickup synchronous signal generating unit, image-pickup timings at which the image pickup unit obtains image data.