... Pages with info on individual constellations: . GPS . glonass . ... Global navigation satellite cause interference in the frequency range 1165 - 1300 Mhz. ... satellite . ... The compass (beidou-2) satellite is part of the global navigation satellite system for china. ... The dynamic spectra above shows some leakage near 1383 MHz and 28 seconds that looks like it is associated with the compass satellite transmission. ... The 10 MHz wide rfi seen at 1268.52 is the Chinese compass satellite. ...

... How much energy is there in a 20 mph wind? . 20 mph wind =10 m/s .0006 * 10 3 = .0006 * 1000 = .6 KILO watts per square meter . ... In your back yard the average wind speed is 10 mph which yields 100 watts per square meter. ... 4 3 = 64 if a 10 mph wind gives you 100 watts per square meter then a 40 mph wind gives you 64 times more power per square meter 6400 watts per square meter . total power = 6400 watts per square meter * 2 square meters = 12800 watts = 12.8 Kilowatts this is a lot! ...

... We Fourier analysed Hubble Telescope Crab pulsar data obtained with the High Speed Photometer in October 1993. A weak modulation at frequency Hz is detected. We found a strong correlation between this result and the Fourier transform result of stroboscopic Crab pulsar data obtained in December 1994 at the 1.82m telescope of Asiago observatory (University of Padua, Italy). ... We found that both data show a weak modulation at the period of 60 seconds. ... The corresponding frequency is Hz . ...

... Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the front end of the disk eclipses more stars than the back, it appears darker. ... Despite its size, the disk is 100 times less massive than the black hole. ... The bright spot in the center of the disk is the combined light of stars that have crowded around the black hole due to its strong gravitational pull. ...

... Armagh Observatory, 24th March 2009: The International Space Station ( ISS ) has recently become the second brightest object in the night sky тАФ even brighter than the planet Venus, and second only to the Moon. Evenings will provide the chance of a spectacular view, if the sky is clear, as for the next few days the orbit of the ISS around the Earth repeatedly takes it over Ireland. ... At its best, it is now the second brightest object in the night sky. ...

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

... Kepler's Laws . ... Second Law . 12a. More on 2nd Law . ... Kepler's 2nd law prescribes the way the velocity V of an object orbiting a single center varies around its orbit: . The rate at which the line to the center ("radius vector") covers area does not change around the orbit." As noted in section #12 , this means that the object's velocity V increases when its distance r decreases, and vice versa. ... Because by Kepler's 2nd law, the Earth moves in its orbit a little faster in winter. ...

Magnetic Stars, 2011, pp. ... 2010). ... 463 Figure 2: Difference between individual and average spectra in Fig. 1 with phase (vertically, on the right) Figure 3: Almost in a year repeatability of spectral lines form (2009.07.05 and 2010.05.31) in an identical phase 464 CHOUNTONOV 4000 3000 Magnetic field, Bz(G) 2000 1000 0 -1000 -2000 2008/05/23 2010/05/31 -3000 0.0 0.2 0.4 0.6 0.8 1.0 phase Figure 4: Longitudinal magnetic field variations with phase (the sine curve, Rivinius et al., ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... Earth Satellites . ... By admin October 4, 2012 Posted in: Moon . A tiny second moon.This is Phobos (27 km across) seen over Mars by ESA's Mars Express (Image credit:ESA) . ... They concluded that at any given time Earth probably has a second moon. ... But, just perhaps, briefly the Earth had a second natural satellite seen by thousands of people.Remember the spectacular fireball witnessed over the UK and Ireland on 21 September 2012 ? ...

... Discovery in Twilight . ... Credit Copyright: Tamas Ladanyi ( TWAN ) Explanation: As evening twilight faded on March 7, sky gazers around planet Earth enjoyed a beautiful pairing of young crescent Moon and brilliant planet Jupiter. ... On its final flight , the Space Shuttle Discovery and International Space Station form the second close pairing in the night skyscape. ... Publications with keywords: Moon - Jupiter - international space station - ISS - space shuttle Discovery . ... Moons and Jupiter ...

... Welcome to the Everyday Classroom Tools web site! ... When you see the symbol on the right, , it means there is an accompanying Adobe Acrobat document (in "pdf" format) you can view and print out. ... The files for download are: Title and Contents Section , The Threads of Inquiry, The Keys to Inquiry, and Folklore Resources , Assessment Strategies , and Bibliography and Journal Form . ... Kindergarten - Second Grade . Second Grade - Fourth Grade . ... Everyday Classroom Tools Home Page . ...

... In spring 1998, we finished our postgrad studing, ".. summer's almost gone" . ... Researcher at ASC. ... Researcher at SAI. ... PhD Dec 1998; Researcher at SAI, postdoc in US. E-mail: atim#sai.msu.ru . ... E-mail: gorshkov#sai.msu.ru . ... E-mail: andrew#sai.msu.ru . ... Phd Oct 1999; Assistant professor at Chicago. ... PhD Feb 1998; E-mail: polar#sai.msu.ru . ... E-mail: sunny#sai.msu.ru Researcher at SAI. ... People of our Great Group (Gr-Gr hereafter), e-mail me, what do you think about it. ...

Some radio clocks and related timekeeping gear have a pulse-per- second (PPS) signal that can be used to discipline the local clock oscillator to a high degree of precision, typically to the order less than 50 us in time and 0.1 PPM in frequency. ... Either way requires conversion of the PPS signal, usually at TTL levels, to RS232 levels, which can be done using a circuit such as described in the Gadget Box PPS Level Converter and CHU Modem page. ...

... The motion of a planet around the Sun or of a scientific satellite around Earth follows different equations (though a connection exists), but in many respect it resembles that of the stone. ... Kepler's law states: . ... Illustrating Kepler's 2nd law: . ... As an example, let the drawing on the right represent the orbit of an Earth satellite, and let AB and CD be the portions of the orbit covered in 3 hours near apogee and near perigee, respectively. ... Gravity can also provide energy. ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

The Australia Telescope Compact Array ( ATCA ) is a radio interferometer consisting of six 22-m antennae aligned along a 6-km-long, east-west track. ... The ATCA Upgrade , which is part of the Major National Research Facility ( MNRF ) program, will allow astronomers to observe at even higher frequencies, around 22 GHz (12 mm) and 90 GHz (3.5 mm). ... The ATCA Upgrade will open a number of new opportunities; these are set out below. ... The ATCA Upgrade involves the following projects: . ...

CCD Spectrometric Detectors based on Princeton Instruments exclusive 1340 в 400 CCD NTE/ CCD -400E · · · · MPP for low dark charge Small height for fast spectral rates Full 26 mm spectral coverage Lowest read noise 100 90 80 Quantum Efficiency, % 70 60 50 40 30 20 10 0 200 300 400 500 600 700 800 900 1000 1100 Front Illuminated with UV Coating Front Illuminated Wavelength, nm ...

... Bojan Nikolic web pages home . ... Previous: Visiting ALMA Santiago office and the ALMA.. This is the second memo in the series. ... By observing bright and compact astronomical sources while also taking data with the 183 GHz Water Vapour Radiometers, ALMA will be able to measure the `empirical' relationship between fluctuations in the phase of the astronomical signal and the fluctuations of sky brightness around 183 GHz. ... Copyright 2012, Bojan Nikolic feedback welcome ...

Astroimager John Chumack from Dayton, Ohio, took this image of Comet ISON (C/2012 S1) on October 18, while it was near reddish Mars and blue-white Regulus (Alpha Leonis). ... He set the camera's speed to ISO 400, placed it on a tracking mount, and, at 6:27 a.m., started a 366-second exposure. He reported, "ISON had cleared the trees around 6 a.m., but dawn started to flood the image with light, not to mention the city lights over D.C. and strong light from a nearly Full Moon. ... John Chumack ...

Communications For Your Astronomy Event . Articles | ... GMRS has been around for many many years. ... If you are reading this you probably do not care about the old school and are only interested in what GMRS has to offer for your basic communication needs. ... However, you really only need to pay attention to the "Well Known Channel" the radio manufacturers like Cobra, Uniden, Midland, etc. seem to have agreed on. ... Channel . ... 462.5625 MHz . ... 5.0 Watts . ... www.astronomy.net . ...