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johnb

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  • Website URL
    http://www.m81.co.uk/

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  • Gender
    Male
  • Interests
    Astro Imaging & Radio Astronomy
  • Location
    London

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  1. Hi I’m trying star trails and have followed a few tutorials but am getting really confused over settings I’m using a Cannon450d with an external intervalometer If set the Camera to Manual and the Shutter speed to 20 sec and then manually start the camera takes a 20 sec shot as expected So if I then set the camera to Bulb set the intervalometer Long- 20 Secs and the interval to 1 sec it simply seems to take a shot that’s 21 Seconds is Long +the interval Any pointers appreciated Kind regards John B
  2. Hi How did you find out the thread size ? Kind Regards John
  3. Hi I have an Skywatcher EQ6 Pro mount and tripod and need some spares for the tripod, specifically I need the long threaded screw that goes through the accessory tray and up through the tripod head which screws into the mount – my current long screw is bent and the two plastic knobs that are attached to the long threaded screw are broken, can anyone point me to a replacement (oh and maybe the correct names of the part) Kind Regards John B
  4. Hi I would be interesting in hearing from anyone who has used the beacon with success, particularly if they are using Spectrum Lab Kind Regards John B
  5. The Radio Astronomy Section, which is part of the British Astronomical Association (BAA) and supported by the Radio Society of Great Britain (RSGB) and The Mansfield and Sutton Astronomical Society are pleased to announce that the UK Radio Astronomy Meteor Beacon - GB3MBA is now up and running. Beacon Status and Frequency can be found here - https://ukmeteorbeacon.org/Bstatus The next phase of the project will be looking at creating a standard receiver with custom software, however anyone who is interested can now use the Beacon to detect Meteors via Radio. If you want any more information please use the Contact Us form on the site - https://ukmeteorbeacon.org/ContactAdd or email us at Contact@ukmeteorbeacon.org Kind regards John B
  6. Hi I’m currently leading on Science Objectives for the UK Beacon project and need your help. If you are not aware of the project the attached flyer gives some background The following lists potential scientific objectives for the UK Beacon. (these are Short-, Medium- and Long-Term Objectives) Accurate meteor counts to assist in identifying new meteor streams and detecting outbursts in current ones.(Show meteor rates of showers over subsequent years, Show meteor peaks of known showers hour by hour etc) Cross correlation of radio traces with BRAMs and Graves beacons. Comparing time, frequency, intensity, doppler shift, duration Cross correlation of radio traces with UKMON video camera observations Compute trajectories of meteoroids using data from multiple receiving stations determination of meteor stream orbits and potentially narrowing down the landing locations for meteorites Study the impact of high-altitude winds on the plasma trails D and E layer studies of the ionosphere HF/VHF emissions from meteors Studies of head echoes Fresnel diffraction patterns in trail, under and overdense events, matching radio to video events, Estimation of the mass index of a meteor shower Calculate meteor fluxes Insights into meteoroid fragmentation processes Each objective needs to be realistic and achievable and if possible, backed up by calculations and/or estimates to demonstrate feasibility of the objective and what data will be required This exercise feeds into the receiver side of the project so we do need to start looking at them. If anyone is interested in collaboration and or leading on a particular objective please do get in touch, if you have any suggestions for more objectives please let me know Kind Regards John Berman UK Beacon Flyer.pdf
  7. I get the error you mention - "ValueError: time data 'x x.000' does not match format '%Y-%m-%d %H:%M:%S.%f'" How did you solve it ? Regards John B
  8. so Gav, contributions are indeed welcome, have you read https://radiometeordetection.org/radioproject - PM me and I will send more info Kind Regards John B
  9. Hi so we are attempting to match Video \ Radio events and its not quite as simple as you would think, to aid us we are mapping the radio sky using known ISS passes (and correcting for location and altitude) If you look at this map https://radiometeordetection.org/radiomap you will see we are making progress, when we have more data we will then look for video events in our area of interest and see if we have any corresponding radio events for more info do have a look here: https://radiometeordetection.org/radioproject Kind Regards John B
  10. Hi I have compressed 3 hours worth into a short clip Kind Regards John B
  11. Hi Some of you may be aware of the Radio Meteor Detection collaboration Project which is a group of contributors who submit their monthly log files after which do a number of things with the data see here for more info: https://radiometeordetection.org/about Our latest exciting project is to see if we can successfully match Radio and Video events to aid our understanding of meteor phenomena, so we are now starting to Map Radio Meteor Altitudes for GRAVES. The attached PDF gives a full description of this project The project brief and maps can be found here: https://radiometeordetection.org If you want any more information or feel you can help in any way, please do get in touch Kind Regards John Berman Mapping Radar Meteor Altitudes for GRAVES.pdf
  12. Hi I should know but need direction to an IOS app for the forum - i did try TapaTalk but failed - pointers appreciated Regards John B
  13. Hi im sure its just settings etc, there is no reason why you should not get get GRAVES all the time its transmitting, I collaborate with others and some are on the south coast like yourself and they have no issues John B
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