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WASHINGTON Cheap David Bakhtiari Jersey , Feb. 21 (Xinhua) -- A pair of U.S. astronauts successfully completed the first of three spacewalks on Saturday, installing over 100 meters of cable outside the International Space Station as part of a preparation for future arrivals of American commercial crew spacecraft.

NASA astronauts Barry Wilmore and Terry Virts "completed all the scheduled tasks for today and one get ahead task," the U.S. space agency said in a statement. "They rigged a series of power and data cables at the forward end of the Harmony module and Pressurized Mating Adapter-2 and routed 340 of 360 feet (110 meters) of cable."

The cable routing work is part of a reconfiguration of station systems and modules for the installation of two international docking adapters to be delivered by a pair of SpaceX Dragon cargo spacecraft later this year.

The new docking ports will welcome U.S. commercial spacecraft launching from Florida beginning in 2017 Cheap Mason Crosby Jersey , permitting the standard station crew size to grow from six to seven and potentially double the amount of crew time devoted to research from 40 hours to 80 hours per week, NASA said.

The two astronauts ventured out of the station at 7:45 a.m. EDT (1245 GMT) and reentered the orbiting outpost at 2:26 p.m. EST ( 1926 GMT).

The spacewalk was the first for Virts, and the second for Wilmore Cheap Bryan Bulaga Jersey , who has conducted one spacewalk last October.

The duo will perform two more spacewalks on Wednesday and March 1.

Because the spacewalks focused on laying and attaching cables, NASA's space station blog called the two astronauts "cable guys."

NASA has relied on Russia's Soyuz capsules to deliver astronauts to the station since the end of the space shuttle program in 2011.

In order to end the reliance, the U.S. space agency awarded contracts last year to Boeing and SpaceX to develop solutions for American astronaut transportation to and from the station.

Currently Cheap Nick Perry Jersey , Boeing is working with NASA on its CST-100 spacecraft, anticipating an orbital flight test in April 2017, then a crewed flight test with one Boeing test pilot and one NASA astronaut in July 2017.

SpaceX is targeting its new crewed Dragon spacecraft to make an uncrewed flight test in late 2016 and a crewed flight test in early 2017.

Today?s dog tracking systems are much more advanced than those used years ago. Tracking systems are nothing new this technology has been around since WWI. Dog tracking systems enable you to hunt with your dog Cheap Corey Linsley Jersey , allow him to roam free, while allowing you to know where he is at. Enabling tracking system polarization allows you to filter out background noise easily, allowing for better clarity of the signal.

Tracking system polarization today makes picking up the signals that are received by a radio transmission much easier. Because the newer Cheap Davante Adams Jersey , polarized systems are lightweight and balanced at the center of gravity, they are more accurate when it comes to pinpointing distance and range. Dog tracking systems are available by transmitting signals through radio frequencies as well as through satellite. Satellite systems operate differently than traditional radio systems. The type of system that you use often depends upon your preference and where you hunt.

In order for the dog tracking systems to be most accurate, the system has to be balanced to the center of gravity. Newer dog tracking systems offer polarization for finer precision tuning. You can get much better frequency and channels with newer dog tracking systems.

Dog tracking systems work by attaching the transmitter to your dog?s collar and holding onto the receiver. Traditional dog tracking systems usually have a holster and allow you to tune into several frequencies and adjust the pitch. When you are going out for the first time using dog tracking systems Cheap Blake Martinez Jersey , it?s a good idea to go with a hunter who is experienced at this type of tracking. It can take a little time to get used to the different pitches in frequencies. One of the most common mistakes that hunters make is to track back signals on the device. You can practice tracking the signal by planting the transmitter somewhere to see if you can locate it with the receiver. Once you get used to doing this, you can then put the transmitter on your dog.

The better polarized your dog tracking system is, the better distance and range you can get with your system. You can check for signal polarization by rotating the receiver 90 degrees to make sure you are on track. Most of the newer dog tracking systems have quality speakers that clearly transmit the signals to you. If you are hunting using an older tracking system Cheap Lane Taylor Jersey , you might want to upgrade to a newer model.

In addition to allowing for easy tracking system polarization, newer systems have noise reduction built right into the system to make it easier for you to block out the background noise and pick up on your signal. They also reduce the amount of back signals that you receive as well.

Most newer gun dog tracking systems sport a three tiered antenna that can easily collapse when you are not tracking your dog. This can aid in polarization of the receiver as well. They offer a more comfortable grip than those in the past as well and LED lighting.

If you are just starting out hunting or are looking for a new dog tracking system you will find that today?s tracking systems are much more advanced than those of years ago.

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