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mmbendou23 favorited a video
(3 hours ago)
video for embedding at http://scitech.qu...
"This video details plan...
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video for embedding at http://scitech.qu...
"This video details planetary motion or orbital mechanics. It explains Kepler's and Newton's Laws plus terminology including perigee, apogee, eccentricity, orbital inclination, launch window, etc."
for all the math, see The Orbital Mechanics of Flight Mechanics, 1973
http://ntrs.nasa....
part 2: http://www.youtub...
part 3: http://www.youtub...
This video primarily deals with Earth orbit navigation. For interplanetary navigation, also see:
The Evolution of Deep Space Navigation: 1962-1989
http://trs-new.jp...
"The navigation of a spacecraft is the process of determining the current position and the predicted flight path of the vehicle and correcting the flight path so that it stays within acceptable limits of the desired trajectory. Spacecraft navigation is a complex process involving the collection of data containing information about the position and velocity of the vehicle (and other pertinent quantities as well), followed by the processing of these data to yield estimates of the vehicle's position and velocity as functions of time. Further computation is then needed to plan corrections for the trajectory dispersions away from the desired flight path that inevitably occur. The computational process requires accurate modeling of the motions of the vehicle and the observational data.
A number of robotic spacecraft have traveled throughout the solar system, collecting in-situ and remote scientific observations. In nearly all cases the ability to determine and control the flight path of the vehicle has been critical to mission success...
All planetary missions involve an approach to at least one celestial body. That body may be simply flown past (or impacted in some fashion), or engines on board the vehicle may be fired to slow it down and place it into orbit around the body. In either case, measurements are acquired as the spacecraft approaches its target, and a spacecraft orbit is determined based on these data. This orbit determination process is repeated as additional measurements are acquired. Trajectory-correction maneuvers (TCMs) are performed several times during the approach, if the predicted encounter conditions are not within some tolerance of the desired conditions. When the last allowable TCM has been performed, typically several days before encounter, the delivery conditions are fixed and cannot be improved further. However, the collection of additional measurements and the generation of subsequent orbit determination solutions allow the trajectory to be predicted more accurately near encounter than it can be controlled. This allows the timing of spacecraft sequences and the pointing of instruments to be adjusted shortly before encounter to optimize the return of scientific data. Measurements that are collected around closest approach are received too late to either modify the encounter conditions or update instrument pointing, but are useful for deducing, after the fact, what the true encounter conditions were, to allow a best reconstructed orbit for science data correlation purposes..."
NASA, space, space program, space navigation, orbital mechanics, orbit change, space manuevering, rendezvous and docking, orbital inclination, perigee, apogee, satellite, orbit
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mmbendou23 favorited a video
(4 hours ago)
http://blogs.math...
This video shows how you can use MATLAB to do the vi...
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http://blogs.math...
This video shows how you can use MATLAB to do the visualization of a moving object with HGtransform. This data was syntetic, but it would be easy to read the data from a file and show the trajectory of other items or vehicles.
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mmbendou23 favorited a video
(4 hours ago)
video for embedding at http://scitech.qu...
"This video details plan...
more
video for embedding at http://scitech.qu...
"This video details planetary motion or orbital mechanics. It explains Kepler's and Newton's Laws plus terminology including perigee, apogee, eccentricity, orbital inclination, launch window, etc."
for all the math, see The Orbital Mechanics of Flight Mechanics, 1973
http://ntrs.nasa....
part 1: http://www.youtub...
part 3: http://www.youtub...
This video primarily deals with Earth orbit navigation. For interplanetary navigation, also see:
The Evolution of Deep Space Navigation: 1962-1989
http://trs-new.jp...
"The navigation of a spacecraft is the process of determining the current position and the predicted flight path of the vehicle and correcting the flight path so that it stays within acceptable limits of the desired trajectory. Spacecraft navigation is a complex process involving the collection of data containing information about the position and velocity of the vehicle (and other pertinent quantities as well), followed by the processing of these data to yield estimates of the vehicle's position and velocity as functions of time. Further computation is then needed to plan corrections for the trajectory dispersions away from the desired flight path that inevitably occur. The computational process requires accurate modeling of the motions of the vehicle and the observational data.
A number of robotic spacecraft have traveled throughout the solar system, collecting in-situ and remote scientific observations. In nearly all cases the ability to determine and control the flight path of the vehicle has been critical to mission success...
All planetary missions involve an approach to at least one celestial body. That body may be simply flown past (or impacted in some fashion), or engines on board the vehicle may be fired to slow it down and place it into orbit around the body. In either case, measurements are acquired as the spacecraft approaches its target, and a spacecraft orbit is determined based on these data. This orbit determination process is repeated as additional measurements are acquired. Trajectory-correction maneuvers (TCMs) are performed several times during the approach, if the predicted encounter conditions are not within some tolerance of the desired conditions. When the last allowable TCM has been performed, typically several days before encounter, the delivery conditions are fixed and cannot be improved further. However, the collection of additional measurements and the generation of subsequent orbit determination solutions allow the trajectory to be predicted more accurately near encounter than it can be controlled. This allows the timing of spacecraft sequences and the pointing of instruments to be adjusted shortly before encounter to optimize the return of scientific data. Measurements that are collected around closest approach are received too late to either modify the encounter conditions or update instrument pointing, but are useful for deducing, after the fact, what the true encounter conditions were, to allow a best reconstructed orbit for science data correlation purposes..."
NASA, space, space program, space navigation, orbital mechanics, orbit change, space manuevering, rendezvous and docking, orbital inclination, perigee, apogee, satellite, orbit
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mmbendou23 subscribed to webdev17
(4 hours ago)
more at http://scitech.qu...
Public domain film from the National Archive...
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more at http://scitech.qu...
Public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied.
http://en.wikiped...
The Yukon Flats National Wildlife Refuge is a protected wetland area in the U.S. state of Alaska. It encompasses most of the Yukon Flats, a vast wetland area centered on the confluence of the Yukon River, Porcupine River, and Chandalar River. The area is a major waterfowl breeding ground, and after a proposal to flood the Yukon Flats via a dam on the Yukon River was turned down, the Yukon Flats were deemed worthy of protection. The Alaska National Interest Lands Conservation Act established the refuge in 1980. It is the third-largest National Wildlife Refuge in the United States, although it is less than one-half the size of either of the two largest, the Arctic National Wildlife Refuge, or the Yukon Delta National Wildlife Refuge. The refuge is administered from offices in Fairbanks.
http://en.wikiped...
The Yukon Flats are a vast area of wetlands, forest, bog, and low-lying ground centered on the confluence of the Yukon River, Porcupine River, and Chandalar River in the central portion of the U.S. state of Alaska. The Yukon Flats are bordered in the north by the Brooks Range, in the south by the White Mountains, and cover an area of approximately 11,000 square miles (28,490 km2). The Yukon Flats are a critical waterfowl breeding ground due to the large area of wetland provided by the estimated 40,000 small lakes and streams in the area. In recognition of this fact, the area is protected under the Yukon Flats National Wildlife Refuge.
The Yukon Flats straddle the Arctic Circle and have an extremely variable climate. Temperatures of 95 F (35 °C) are not uncommon in summer, while winter temperatures have been known to drop to -70 F (-57 °C).
Several thousand Alaska Natives and others live in the Yukon Flats area. Though most of the region's people are concentrated in the villages of Fort Yukon, Venetie, Beaver, Stevens Village, Chalkyitsik, and smaller settlements, numerous hunting cabins and seasonal settlements also dot the region. The region also contains a large deposit of crude oil and natural gas, a fact that has provoked conflict between drilling interests and those interested in protecting wildlife in the region.
In 2008, a land trade was proposed between Doyon, Limited and the federal government. In exchange for several thousand acres of oil- and gas-rich land, Doyon offered to donate a somewhat larger parcel of land to the wildlife refuge. Debate about the land trade is ongoing and has not yet been resolved.
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This is a tutorial with pictures on how I sideload apps from my Android ...
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This is a tutorial with pictures on how I sideload apps from my Android 2.3 Phone to My Kindle Fire without rooting.
1. On Kindle Fire, download the Easy Installer App from the Amazon App Store.
2. On Android Phone Download Astro File Manager
3. Open Astro File Manager on Phone.
4. Back Up All Apps on Phone that you'd like to get onto Kindle.
5. Connect Phone to Computer Via USB.
6. Find Apps Folder on the Phone "Drive" from Computer.
7. Copy Desired .APK App Files to Computer.
8. Connect Kindle Fire to Computer and Log Into Kindle Fire.
9. Copy Desired .APK App Files From Computer To Kindle Fire.
10. On Kindle Fire, Launch Easy Installer App.
11. Select Desired Apps and Install.
12. Smile, your Kindle Fire just got more useful.
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