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TechEdSat-5
Technology Education Satellite (TechEdSat) is a successful nano-sat flight series conducted from the NASA Ames Research Center in collaboration with numerous universities (San Jose State University, University of Idaho, University of California, University of Minnesota, and Smith College). While one of the principal aims has been to introduce young professionals and university students to the practical realm of developing space flight hardware, considerable innovations have been introduced. In addition, this evolving flight platform has tested concepts for Low Earth Orbit (LEO) sample return, as well as planetary nano-sat class mission concepts. TechEdSat-1 The first TechEdSat (later renamed "TechEdSat-1" or "TES-1") was a 1U-Cubesat designed to evaluate Space Plug-and-play Avionics (SPA) designed in Sweden by ÅAC Microtec. It was also originally intended to perform a communications experiment utilizing the Iridium and Orbcomm satellite phone network, although this fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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San Jose State University
San José State University (San Jose State or SJSU) is a Public university, public research university in San Jose, California. Established in 1857, SJSU is the List of oldest schools in California, oldest public university on the West Coast of the United States, West Coast and the founding campus of the California State University (CSU) system. The university, alongside the University of California, Los Angeles has academic origins in the historic normal school known as the California State Normal School. Located in downtown San Jose, the SJSU main campus is situated on , or roughly 19 square blocks. As of spring 2023, SJSU offers 150 bachelor's degree programs, 95 master's degrees, 5 doctorate, doctoral degrees, 11 different credential programs, and 42 certificates. SJSU is accredited by the WASC Senior College and University Commission. The university is Carnegie Classification of Institutions of Higher Education, classified among "R2: High Research Spending and Doctorate Pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Kibō (ISS Module)
, also known as the Japanese Experiment Module (JEM), is a Japanese science module for the International Space Station (ISS) developed by JAXA. It is the largest single ISS module, and is attached to the Harmony (ISS module), ''Harmony'' module. The first two pieces of the module were launched on Space Shuttle missions STS-123 and STS-124. The third and final components were launched on STS-127. Components In initial configuration, ''Kibō'' consisted of six major elements: * Pressurized Module (PM) * Exposed Facility (EF) * Experiment Logistics Module (ELM) Pressurized Section (ELM-PS) * Experiment Logistics Module (ELM) Exposed Section (ELM-ES) * Japanese Experiment Module remote manipulator system (JEMRMS) * Inter-orbit communication system (ICS) Pressurized Module The Pressurized Module (PM) is the core component connected to the port hatch of Harmony (ISS module), ''Harmony''. It is cylindrical in shape and contains twenty-three International Standard Payload Racks ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Patch Antenna
A patch antenna is a type of antenna with a low profile, usually consisting of a printed circuit board. It consists of a planar rectangular or circular sheet or "patch" of metal, mounted over a larger sheet of metal called a ground plane. It is the original type of microstrip antenna described by Howell in 1972. The two metal sheets together form a resonant piece of microstrip transmission line with a length of approximately one-half wavelength of the radio waves. The radiation mechanism arises from fringing fields along the radiating edges."Radiation from Microstrip Radiators," IEEE Transactions on Microwave Theory and Techniques, April 1969, Vol. 17, No. 4 pp.235-236 The radiation at the edges causes the antenna to act slightly larger electrically than its physical dimensions, so in order for the antenna to be resonant, a length of microstrip transmission line slightly shorter than one-half the wavelength at the frequency is used. The patch antenna is mainly practical at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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70-centimeter Band
The 70-centimeter or 440 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio and amateur satellite use. The ITU amateur radio allocation is from 430 to 440 MHz; however, some countries, such as the United States, allocate hams 420 to 450 MHz. Depending on the country the band is shared with other radio services (in United States with government radar systems such as PAVE PAWS). 70 centimeters is a popular ham band due to the ready availability of equipment in both new and used markets. Most amateurs operating on 70 cm use either equipment purpose-built for ham radio, or commercial equipment designed for nearby land mobile frequencies. Amateurs usually use the band for FM or digital voice communications through repeaters (useful for emergency communications), as well narrow band modes (analog and digital) for long-distance communications (called "DX", including Moon bounce). The band is also popular for Amateur Satel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Monopole Antenna
A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane. The current from the transmitter is applied, or for receiving antennas the output signal voltage to the receiver is taken, between the monopole and the ground plane. One side of the feedline to the transmitter or receiver is connected to the lower end of the monopole element, and the other side is connected to the ground plane, which may be the Earth. This contrasts with a dipole antenna which consists of two identical rod conductors, with the current from the transmitter applied between the two halves of the antenna. The monopole antenna is related mathematically to the dipole. The vertical monopole is an omnidirectional antenna with a low gain of 2 - 5 dBi, and radiates most of its power in horizontal directions or low elevation angles. Common types of monopole antenna are the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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2-meter Band
The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia). The license privileges of amateur radio operators include the use of frequencies within this band for telecommunication, usually conducted locally with a line-of-sight range of about . Operation Because it is local and reliable, and because the licensing requirements to transmit on the 2-meter band are easy to meet in many parts of the world, this band is one of the most popular non- HF ham bands. This popularity, the compact size of needed radios and antennas, and this band's ability to provide easy reliable local communications also means that it is also the most used band for local emergency communications efforts, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Quake Global
Quake Global is a technology company that provides products for asset tracking, location, and analytics. Quake Global designs and implements facility or campus level asset tracking products typically based around RFID and/ or BLE technology. In 2012, Quake Global received an Inc. 5000 rank of 82 in the San Diego Metro Area. The company is based in San Diego. Company Quake Global was founded in 1998. The company provides products and services in providing products and services for asset tracking, using RFID technology The company also designs and implements machine to machine (M2M) communication devices that are intended to utilize cellular networks or satellite networks to manage devices globally. They service organizations in various fields such as healthcare and law enforcement.. As of 2020 Quake Global's products are installed in over 150 countries with over 1.5 million devices delivered worldwide. In 2010, Quake Global purchased transportation-tracking company, Stellar Satell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Orbcomm (satellite)
Orbcomm is a family of low Earth orbit communications satellites, operated by the United States satellite communications company Orbcomm. , 62 such satellites have orbited Earth, with 61 still continuing to do so. Satellite types Orbcomm-CDS Orbcomm-CDS (Concept or Capability Demonstration Satellites) are spacecraft which were launched to test equipment and communication techniques used by the other satellites. The first three CDS satellites, Orbcomm-X, CDS-1 and CDS-2, were launched before any operational satellites, in order to validate the systems to be used in the operational constellation. Orbcomm-X, also known as Datacomm-X, was launched in 1991. It carried communications and GPS experiments. Initially, the spacecraft was reported healthy, but communication was lost after just one orbit. CDS-3 was launched in 2008, along with the 5 Quick Launch satellites. It contained experiments for relaying signals from the United States Coast Guard Automatic Identification Sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Iridium Satellite Constellation
The Iridium satellite constellation provides L band voice and data information Pass (spaceflight), coverage to satellite phones, satellite messenger communication devices and integrated transceivers. Iridium Communications owns and operates the Satellite constellation, constellation, additionally selling equipment and access to its services. It was conceived by Bary Bertiger, Raymond J. Leopold and Ken Peterson in late 1987 (in 1988 protected by patents Motorola filed in their names) and then developed by Motorola on a fixed-price contract from July 29, 1993, to November 1, 1998, when the system became operational and commercially available. The constellation consists of 66 active satellites in orbit, required for global coverage, and additional spare satellites to serve in case of failure. Satellites are placed in low Earth orbit at a height of approximately and Orbital inclination, inclination of 86.4°. The nearly polar orbit and communication between satellites via Ka band I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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CubeSats Launched By ISS Expedition 33
A CubeSat is a class of small satellite with a form factor of cubes. CubeSats have a mass of no more than per unit,, url=https://static1.squarespace.com/static/5418c831e4b0fa4ecac1bacd/t/5f24997b6deea10cc52bb016/1596234122437/CDS+REV14+2020-07-31+DRAFT.pdf , title=Cubesat Design Specification , publisher= Cal Poly SLO , year=2020 , location=San Luis Obispo , pages=12 and often use commercial off-the-shelf (COTS) components for their electronics and structure. CubeSats are deployed into orbit from the International Space Station, or launched as secondary payloads on a launch vehicle. , more than 2,300 CubeSats have been launched. In 1999, California Polytechnic State University (Cal Poly) professor Jordi Puig-Suari and Bob Twiggs, a professor at Stanford University Space Systems Development Laboratory, developed the CubeSat specifications to promote and develop the skills necessary for the design, manufacture, and testing of small satellites intended for low Earth orbit (LEO) that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |