... Up: Interrupts and Signals Previous: Sending Signals - kill() . int (*signal(int sig, void (*func)()))() - that is to say the function signal() will call the func functions if the process receives a signal sig . ... signal(SIGINT, SIG_IGN); . ... Finally lets write a program that communicates between child and parent processes using kill() and signal(). fork() creates the child process from the parent. ... The child picks up these signals with signal() and calls appropriate functions. ...

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• IPC:Interrupts and Signals: <signal.h>
• Interprocess Communication (IPC), Pipes
• Sending Signals - kill()

Radio Interferometry Principles . Radio Interferometry Signal Processing . ... A radio interferometer consists of a pair of directional antennas that are tuned to receive radio emissions from a source in a desired RF band. ... The antennas are pointed at the radio source of interest and are set up to receive the signal and process it into a form suitable for transmission to the correlator. ... In connected element interferometry, the digital signal goes directly to the correlator. ...

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21apr13: jumps in adjacent bands after processing: . 04nov12: 1 mock box with glitches. ripple in polB 1 box for 1 pattern . ... both mock groups in use (g0 and g1). hi res mode to (86, 57 MHz bw) depending on rcvr. offset the bands to get rid of Dc spike . ... There were 3 dps patterns taken. ... Black is polA, red is polB . ... PolA and polB had similar jumps and slopes. ... Red in polA, green is polB . ... It was replaced 05nov12. 1 mock box (b5s1g1) showed 10 MHz ripple in 1 dps pattern polB . ...

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• system_temperatures
• jun12-dec12 sysperf,pnterror
• cb azswings 13jan16

ASKAP Signal Processing Overview DIFX Users and Developers Meeting Dr. Grant Hampson | ... DIFX Users and Developers Meeting | Grant Hampson | 25 Sep 12 ASKAP Differences · BETA (Eng. ... 25 Sep 12 Frequencies? ... 25 Sep 12 Why use FPGAs for Beamforming? ... 25 Sep 12 Why use FPGAs for Correlator? ... Thank you CSIRO Astronomy and Space Science Dr. Grant Hampson ADE Team Leader t + 61 2 9372 4647 e grant.hampson@csiro.au w www.csiro.au/cass CSIRO ASTRONOMY AND SPACE SCIENCE ...

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• mmATCA Receiver Package
• First image made with ASKAP Mk II receivers | Australia Telescope National
• The Parkes 21cm Multibeam Receiver

... The set of equipment includes 8-mm band transmitting/receiving module (TRM), 1.5-cm band multi-channel receiver, and 2-cm band receiving module. TRM, operating in 8-mm range, assures two-way communication with up to 10 Mbaud rate (33–36 GHz input/output frequency). The 1.5-cm receiver is designed for receiving the service and scientific data from the space radio interferometer in 18–26 GHz frequency range (8 channels) with up to 36 Mbaud data transfer rate. ... 1.5-cm multi-channel receiver . ...

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• Prognoz Spacecraft

... Forum: The Linux Kernel Hackers' Guide . Keywords: socket, kernel . ... It works fine while data is passed at less than ~4K per write. Otherwise I receive a "Broken pipe" mistake :( Looks like kernel internal buffers are not being empied while I'm in kernel mode. I tried setsockopt(TCP_NODELAY), sleeping { current->state = INTERRUPTIBLE; current->timeout = jiffies + 10; schedule();} with no success. ... How should I make sockets to work? I'd be happy being pointed to some TFM :) . ...

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• Arcetri Radioastronomy group
• HwB: EIA-449 (RS-449) Connector (Offline)
• Venera 15 & 16

... files referenced by the PNMs are FTPed to PASSOPS: . ... one of the standard PASS calibration files or the . ... Modules . ... Data . ADD_PASS_ARCHIVE_DIR = '/data/scheduling/spss_flight_data/pass/archive/add' . CALIBRATION_DIR = '/data/scheduling/spss_flight_data/pass/calib' . ... CCSXFER = '/data/scheduling/spss_flight_data/pass/ccsxfer' . ... PASS_ARCHIVE_DIR = '/data/scheduling/spss_flight_data/pass/archive' . PASS_TO_SPUNIX_DIR = '/data/scheduling/spss_flight_data/pass/tospunix' . ...

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• Additional DF-224 Processing
• Python: module receive_dan
• On-the-Fly Reprocessing

... Driver ID: GPS-AS2201 . ... This driver supports the Austron 2200A/2201A GPS/LORAN Synchronized Clock and Timing Receiver connected via a serial port. It supports several special features of the clock, including the Input Buffer Module, Output Buffer Module, IRIG-B Interface Module and LORAN Assist Module. ... The specific data collection commands and attributes are embedded in the driver source code; however, the collection process can be enabled or disabled using the flag4 flag. ...

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• Hewlett Packard 58503A GPS Receiver
• PSTI/Traconex 1020 WWV/WWVH Receiver
• Line Disciplines and Streams Modules

... Tracking stations will be selected in accordance with the schedule issued daily by the General Operative Control Group (GOCG) in Lavochkin Association with the gaps in operations during spacecraft contact with the control stations (CS). ... Communication frequencies (carrier): high data rate information transmission downlink from the SRT ­ 15.000 GHz; uplink synchronization ­ 7.2075 GHz; downlink synchronization ­ 8.400 GHz. ...

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• RadioAstron main page, english version
• Description of the RadioAstron project, english version
• RadioAstron Monthly Notices

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...

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• Venera 15 & 16
• Calvin Hamilton
• Satellites with commercial missions

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . ... SSRT - Receiving systems . The SSRT has two independent receiving systems for recording solar observational data, and several ancillary receivers for checking, setting up and adjusting the instrument. The base receiving systen is a multichannel filter receiver for a simultaneous recording in 180 channels with the 500 kHz band each, adjusted at steps of about 600 kHz. ... Channel's band . ...

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... Satellite data ] . ... The SCANOR system provides receiving and processing of the Earth-surface pictures made in visible and infra-red bands and transferred by satellites of the NOAA polar orbiter series (in the HRPT mode). ... The SCANOR system includes the desktop receiving device connected to an IBM AT 386 type computer, and the parabolic antenna with the guiding mechanism. The SCANOR system possesses the state-of-art software providing registration and processing of the received data. ...

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• SMIS IKI RAN (Satellite data)
• SMIS IKI RAN: table of contents
• SMIS IKI RAN (Sample Images / Miscellaneous)

... Up: Data Pipelines . ... The Data Handling System (DHS), developed for the Gemini project by the Canadian Astronomy Data Centre, accepts observational data from multiple sources. There may be data descriptions, image data in chunks (to be composed into a single image), and multiple images for one dataset, all being received at different times. ... DHS is data-driven and is composed of a collection of servers that work together to act on any data it receives from any Gemini principal system. ...

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• Interfacing the Tk Toolkit to ADAM
• Simulations of Pinhole Imaging for AXAF: Distributed Processing Using the MPI
• The Client Server Design of the Gemini Data Handling System

Chaotic generator . Generator of UWB microwave chaotic signals . Frequency band: 3–5 GHz . Spectrum bandwidth: 2 GHz . ... Testbed of UWB high-rate direct chaotic communication system . ... Low-rate system for data transmission . ... The system for controlling this robot is based on technology of UWB wireless communications with chaotic radio pulses as information carriers. ... System frequency band: 3–5 GHz . Control signal bandwidth: 2 GHz . ... Wireless data collecting system . ...

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• Research Activities of InformChaos Lab.
• Basic Principles of Direct Chaotic Communications - NDCS-03
• Information Processing with Chaos - Neural Networks

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Antenna system . ... The Irkutsk incoherent scatter radar is one of the world's nine active radars which give the opportunity to investigate ionosphere by the incoherent scatter method. ... Antenna gain coefficient . ... Antenna . ... Two antennas . ... To get an idea what station "Dnepr" antenna system looks like, let us consider some of the radar views which are given by the photographs General view and Side view . ...

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• East Siberian Center of Earth Ionosphere Research. Chirp ionosonde.
• East Siberian Center for the Earth's Ionosphere Research. Modernization...
• East Siberian Center of Earth Ionosphere Research. IS radar Receivers Hall.

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... ISS Russian Segment . ... Study of USH-radio signal transmit/receive conditions in the mode of onboard radio beacon in the ISS RS using world-wide ham radio network. ... Determining zones of DP radio shadowing zones by the station structural members depending upon its spatial orientation. ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

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• INTERNATIONAL SPACE STATION

... The SAS_ODF environment variable shall be set to the summary file produced by odfingest , or to a directory containing the data, and access to calibration files shall be set through cifbuild . ... In order to process a single exposure containing fast mode data as . ... Note that tracking data may not be good enough, in which case no plot is produced. omdrifthist set =/path_to_your_data/fast/tmp_tracking plotfile =/path_to_your_data/fast/P0125321001OMS002TSHPLT0000.PS trackradius =0.5 hardcopy =yes ....

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• omi_stepbystep
• Parameters

Communications For Your Astronomy Event . Articles | ... Some manufacturers have received approval to market radios that are certified for use in both the Family Radio Service (FRS) and the General Mobile Radio Service (GMRS). ... FRS radios have a maximum power of Ѕ watt (500 milliwatt) effective radiated power and integral (non-detachable) antennas. ... FRS and GMRS Channel 1 . ... The FRS/GMRS radios I have transmit more than 1/2 watt when on channels 1-7 and 15-22. ... www.astronomy.net . ...

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• The Astronomy Shop - Cards - by Astronomy Net

... After passing degree work in MAO of NAS of of USSR Sosonkin has received the recommendation for receipt in post-graduate course of M??. ... Subjects of his scientific work were use of new receivers of radiation, in particular of electron-optical converters at observant astronomy. ... On industrial base FTI Sosonkin has created installation on base EOC UM - 92 for Cassegrain focus of a telescope ?ZT-2 and similar to it and installation with the same type EOC for focus of Newton. ...

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• Area of scientific investigations
• Laser Communications Products