![]() ![]() Page Created: 2010 June 29 Page Last Updated: 2020 February 25
Welcome to Starlight Cascade Observatory Radio Jove Project ! | Radio JoveRadio JOVE students and amateur scientists observe and analyze natural radio emissions of Jupiter, the Sun, and our galaxy.The Radio JOVE project is a hands-on inquiry-based educational project that allows students, teachers and the general public to learn about radio astronomy by building their own radio telescope from an inexpensive kit and/or using remote radio telescopes through the internet. Participants also collaborate with each other through interactions and sharing of data on the network. The Radio JOVE project began in 1998. Since then, more than 1100 teams of students and interested individuals have purchased our non-profit radio telescope kits and are learning radio astronomy by building and operating a radio telescope. This self-supporting program continues to thrive and inspire new groups of students as well as individuals. ![]() ![]() ![]() ![]() |
Local Time latest image timestamp: Feb 25 14:30 skypipepic.jpg
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Local Time latest daily image timestamp: Feb 25 14:30 skypipepicfv.jpg
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![]() The dual dipole antennas set to 15' above ground aligned to geographic east/west. |
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We plan to build the receiver assembly in the next week, find some RG6 coax to run from the combiner to the receiver and then finding some spare computer to take the audio output from the receiver and run it through a data recorder such as skypipe.
We need approx 70' of coax to run from the antenna to the observatory building where the computer will be.
Using RG6 coax (we could not find any RG59) we determined that the nearest 0.5 wavelength that is at least that long is 2.5 wavelengths
of 38.18' (11.64m) or 95.45' (29.1m) in total. Luckily our local Rona hardware store sells a 30m roll of RG6 for only $40 or so.
Jupiters declination in mid 2010 is approx 0 degrees and is increasing. It's elevation based on our latitude of approx 45 degrees will be approx 45 degrees and increasing.
The antenna height above ground for 40-55 degrees is 15', so we assembled the mast for that height.
JEA=JupiterElevationAngle; AH=AntennaHeight 2010 Jul1 JEA=45deg AH=15' manuals/2011 Jan1 JEA=43deg AH=15' 2011 Jul1 JEA=56deg AH=10' 2012 Jan1 JEA=55deg AH=15' 2012 Jul1 JEA=65deg AH=10' 2013 Jan1 JEA=65deg AH=10'
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crontab
#runs hourly at 1 minute after the hour 1 * * * * /radiojove/moveimages #runs hourly at 2 minutes after the hour 2 * * * * /radiojove/process #runs once daily at 23:59 UT *needs to change when we move from EDT to EST 59 19 * * * /radiojove/archivedailyutmoveimages script
#!/bin/bash echo moving any images from radiojove to radiojove/archive/2011daily and 2011hourly cd /radiojove/ for i in *skypipepicfv.jpg do mv $i archive/2011daily/$i done for i in *skypipepic.jpg do mv $i archive/2011hourly/$i doneprocess This script includes many redirections that do not display correctly within this html page.
archivedailyut
#!/bin/bash cd /radiojove/ LS=/bin/ls echo at 23:59 UT copy last24 and rename to date and copy to archive datetimestamp=`$LS last24.htm -lgo --time-style=+%Y%m%d_%H%M_%S | cut -c 19-34` cp last24.htm "archive/scorj-$datetimestamp.htm"