Co-axial cable Impedance. Matching impedance is not too critical when you are not transmitting POWER. where out of phase reflections can cause much higher voltages to be created often referred…
Observing Advice for the NRAO Skynet 20-meter telescope Following is from 22/3/2025 on following link: https://www.gb.nrao.edu/20m/obsadvice.html Links UNC Skynet 20m skynet interface Log of 20m results. latest observation NRAO Skynet…
SARA members have access to this telescope, providing an incredible opportunity to use a professional telescope for personal observations, which will be used for educational purposes. A ZIP file of…
Another project underway is water maser radio observing. This requires a 1m dish (arrived today, below) and an LNB for 22 GHz (ordered from USA) and a HEQ5 Pro mount…
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I own the VA40B Multimeter – part of my testing regime for aerials involves measuring resistance. To ensure accurate resistance measurements with your VA40B multimeter, it’s essential to account for…
In cosmology, a positive Doppler shift in radio waves means an object is moving away from us. This happens because the waves get redshifted — their wavelength stretches, and the…
1. Visual Inspection Check for: 2. Continuity and Resistance Testing Using a multimeter: 3. SWR Measurement Use an SWR meter or antenna analyzer at 1420 MHz: 4. Feedline Loss Test…
The following is an extract from https://fits.gsfc.nasa.gov/fits_viewer.html: FITS Image Software Packages for image viewing, analysis, and format conversion The following software packages display or manipulate the relatively simple class of…
The SDFITS single dish data format (https://safe.nrao.edu/wiki/bin/view/Main/SdfitsDetails#:~:text=Briefly%2C%20SDFITS%20is%20a%20convention%20for%20storing%20single-dish,freedom%20to%20add%20any%20additional%20columns%20as%20necessary): The SDFITS convention was developed in the late 1980s. An early version was used in the UniPOPS data analysis program and it was…
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