As the James Webb Telescope completes its challenging one-month journey to the final orbit, its components gradually open to give it its final shape. But Why is there no direct picture of this process and the mission team has no camera to record the deployment process?
While NASA's James Webb Space Telescope moves toward its final orbit around Lagrangian point 2 , Ground teams use a comprehensive set of sensors located throughout the spacecraft to study its vital features. Mechanical, thermal, and electrical sensors, while the web is in space, provide a wide range of vital information about its current state and function.
- See the breathtaking path of the James Webb Space Telescope from historic launch to deployment
But given the importance of the Web and its deployment from around the world, many people are wondering Why the Web Do not have a camera to display this deployment? That's Why NASA has provided an explanation. In fact, in the original ideas, a system of surveillance cameras was deployed to watch the deployment for inclusion in the Web diagnostic toolbox, and was widely studied at the design stage, but the idea was eventually rejected.
" "Adding cameras to watch this unprecedented and complex deployment process may seem like no problem, but there is so much more to James Webb than meets the eye," said Paul Geithner, Web project technical assistant. "It's not just adding a camera to the doorbell or even a camera on a rocket."
There are a lot of changes in its configuration and it requires a lot of special places to be in the final state. Surveillance of the Web deployment with a camera either requires multiple cameras with limited field of view, which complicates the mission considerably, or requires an open field camera that does not provide useful useful details. The wires of the cameras must also pass through the moving links around the observatory, increasing the risk of vibration and heat leakage, which poses a great challenge for cameras located on the cold side of the web.
On the other hand, there is the issue of light. . The web is very bright, so cameras visible on the sunny side are exposed to bright light and contrast problems, while cameras on the cold and shadowy side are in the dark and need more light. p>
Although infrared or cool-angle cameras can meet this need for more light, they will still have the same installation problems. In addition, cold side cameras must operate cryogenically at very cold temperatures. To do this, either ordinary cameras must be encapsulated or insulated to operate in extreme cold temperatures, or special cameras adapted to low temperatures, developed only to capture the web deployment process.
Despite awareness Of these challenges, engineers have even tested some camera designs on full-scale models of web hardware. But they eventually found that the deployment surveillance cameras did not provide valuable information to the engineering teams commanding the spacecraft from the ground.
- Final Test "The Web's sense of
internal detection (for example, switches and various mechanical,
electrical, and thermal sensors) provides much more useful
information than surveillance cameras," said James Webb, the
ground-based mirror of the James Webb Space
Telescope. "Like many other unique spacecraft, we have
equipped the Web to provide all the specific information needed to
keep engineers on the ground informed of the health and condition
of the observatory during all operations." Relate web-based
experiments with remote sensing data from flight sensors to
interpret and understand flight data accurately, so that the
camera does not rest on the web.
Cover Photo: James Webb Space Telescope in stages Ground Preparation
Source: NASATags: why, does, james, webb, telescope, not, have, camera, show, deployment, process, space