{"product_id":"qhyccd-gps-box","title":"QHYCCD GPSBOX","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInjects high-precision GNSS timing data into your image stream\u003c\/li\u003e\n\u003cli\u003eUtilizes both GPS and Beidou satellite navigation systems\u003c\/li\u003e\n\u003cli\u003eSynchronizes internal clock to the Pulse-Per-Second (PPS) satellite signal\u003c\/li\u003e\n\u003cli\u003eFeatures a fault-tolerant design to handle temporary signal loss\u003c\/li\u003e\n\u003cli\u003eOutputs calibration data to correct for temperature-induced frequency drift\u003c\/li\u003e\n\u003cli\u003eConnects via a dedicated accessory port on compatible QHYCCD cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eGPSBOX\u003c\/h2\u003e\n      \u003cp\u003eThe QHY GPSBOX injects ultra-precise timing data directly into the data stream of compatible QHYCCD cameras. By synchronizing its internal, high-stability oscillator with global navigation satellite systems (GNSS), it enables advanced scientific applications like asteroid occultation timing, satellite tracking, and meteor analysis where exact time stamping is non-negotiable. This module is engineered for reliability, with a robust fault-tolerance mechanism and self-calibration to ensure timing accuracy is maintained even under challenging field conditions.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eHigh-Precision GNSS Time Stamping for Scientific Imaging\u003c\/h3\u003e\n      \u003cp\u003eThe core of the GPSBOX is a GNSS module compatible with both GPS and Beidou satellite constellations, selectable via software. It captures the universal Pulse-Per-Second (PPS) timing signal broadcast by these satellites and uses it to continuously discipline a voltage-controlled crystal oscillator (VCXO). This process ensures the camera's internal clock is strictly aligned with the global time standard, embedding each frame with a timestamp of exceptional accuracy.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eRobust Signal Integrity with Fault Tolerance and Self-Calibration\u003c\/h3\u003e\n      \u003cp\u003eReal-world observing can be unpredictable, with satellite signals potentially blocked by trees or buildings. The QHY GPSBOX is designed with a perfect fault-tolerance mechanism to handle this. If the PPS signal is lost, the system temporarily relies on its internal clock and flags the data accordingly. Once the satellite signal is reacquired, the PPS signal immediately resets the timer, completely eliminating any accumulated error and restoring full timing precision without carrying over previous drift.\u003c\/p\u003e\n      \u003cp\u003eFurthermore, the GPSBOX constantly measures its own internal oscillator against the GNSS signal. It outputs this measurement data, allowing software to accurately calibrate and correct for any frequency drift caused by ambient temperature changes, ensuring consistent accuracy throughout an observing session.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eDirect Integration with QHYCCD Cameras\u003c\/h3\u003e\n      \u003cp\u003eThe GPSBOX is designed to connect directly to QHYCCD cameras that feature the required multi-pin aviation-style accessory port. This direct link allows timing data to be seamlessly merged with the imaging data from the sensor. Not all QHYCCD cameras include this port as standard.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNative Compatibility:\u003c\/strong\u003e Check your camera's specifications to confirm it has the necessary 6-pin accessory port for out-of-the-box use.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFactory Modification:\u003c\/strong\u003e Cameras with other port types (such as 5-pin) or no port can often be modified by QHYCCD to be compatible with the GPSBOX. Please contact the manufacturer for this service.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main purpose of the QHY GPSBOX?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe QHY GPSBOX provides extremely accurate timing information to a compatible QHYCCD camera by synchronizing it with GPS and Beidou satellite signals. This is critical for scientific research such as timing asteroid occultations, tracking satellites, and analyzing meteor events, where knowing the exact time of an exposure is essential.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich satellite systems does the GPSBOX use?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe QHY GPSBOX has a built-in GNSS module that can operate with pure \u003cstrong\u003eGPS\u003c\/strong\u003e, pure \u003cstrong\u003eBeidou\u003c\/strong\u003e, or in a \u003cstrong\u003eGPS\/Beidou dual-mode\u003c\/strong\u003e. The desired mode of operation can be configured through software.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the GPSBOX handle losing satellite lock during an imaging session?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt features a robust fault-tolerance system. If the Pulse-Per-Second (PPS) signal from the satellite is lost, the GPSBOX will switch to an internal timer and record that the data is no longer locked to the PPS signal. As soon as the satellite signal is restored, the PPS will reset the internal timer, eliminating any accumulated error and returning to full precision.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich QHYCCD cameras are compatible with the GPSBOX?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe GPSBOX requires a camera with a specific \u003cstrong\u003e6-pin aviation-style accessory port\u003c\/strong\u003e for direct connection. You must check your camera's specifications to ensure it has this port. Some other models (e.g., those with a 5-pin port) can be made compatible through a factory modification performed by QHYCCD.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm timing a lunar occultation of a star like Regulus. How does the GPSBOX ensure my data is accurate?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor an occultation of Regulus (Alpha Leonis), timing is everything. The GPSBOX uses the Pulse-Per-Second (PPS) signal from GPS satellites to strictly align your camera's clock with the global time standard. This embeds a highly accurate timestamp into every frame, allowing you to determine the exact moment of disappearance and reappearance with the precision required for scientific contribution.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy observatory gets very cold at night. Will temperature changes affect the timing accuracy of the GPSBOX?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe GPSBOX is designed to mitigate this. The internal crystal oscillator, like any electronic component, can experience slight frequency drift with temperature changes. To combat this, the GPSBOX constantly outputs a measurement of its internal clock's frequency relative to the stable GNSS signal. This allows software to apply a real-time correction, compensating for temperature effects and maintaining high accuracy.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.qhyccd.com\/download\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942983921949,"sku":"QHY-090038","price":300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-GPSBOX-1_3d65e9cb-dcb9-4b8b-b138-0b993fa6c913.jpg?v=1789614822","url":"https:\/\/davidastro.com\/fr-us\/products\/qhyccd-gps-box","provider":"David Astro","version":"1.0","type":"link"}