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4wd

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Posts posted by 4wd

  1. Some sites will show you the sun altitude at noon, when the angle is 25 degrees or higher there's  something of a stepchange in the amount of energy getting through the atmosphere, below 25 degrees far more is reflected away.
    Here that's 25th February but I guess some places further south are already there. 

    e.g. *change to your location

    cityog.php?title=Sunrise%20and%20Sunset%
    WWW.TIMEANDDATE.COM

    Calculations of sunrise and sunset in York – England – United Kingdom for February 2020. Generic astronomy calculator to calculate times for sunrise, sunset, moonrise, moonset for many cities, with...


     

    • Like 1
  2. 1 hour ago, Snowycat said:

    Yes, I think you saw my post a day or so ago when I touched on this.  Again no offence but I have a very hard view on this indeed.  When you embrace such a barbaric inhuman cruel culture with regard to food and the subsequent food hygiene problem it causes, you can only expect bad things to happen.  My sincere sympathies are reserved for any innocent people who have already fallen or will fall victim to the virus as collateral damage.  I always try to avoid anything made in China on account of their poor practices on food, human rights and their poor contribution to the environment but as they swamp the international markets with literally everything it is a very hard task.  As I said it is about time the rest of the world got tough with China with some hard truths about their practices with a warning of some sort somehow suggesting they clean their act up.  

    This is probably jumping to conclusions, one of the earlier BBC reports said cases were first picked up at another location, the crowded market would be a good place for initial spread though.

    • Like 2
  3. It is those, I'm at a loss why media reporting today won't say the Hotel (a self catering apartment at StayCity near York Barbican in Paragon Street) or the fact they are Chinese Nationals presumably on holiday.
    The trouble is the days before they would be mixing with hundreds of others of course

    • Like 1
  4. 38 minutes ago, General Cluster said:

    But any novel infection, when introduced into a 'virgin' population, will spread exponentially...But that doesn't mean that it'll infect everyone...?

    Naive population would be better term.
    In reality assuming no vaccine is produced dramatically change the odds the infection spread very rapidly at first, however various mutations spring up with different severity.
    The more severe versions make the host so unwell they stay home and might die, only immediate family are at special risk.
    The less severe mutations people don't die and are unwell for a shorter period. They are more likely to spread the less deadly version. They recover and are largely immune form similar strains including the most serious versions.

    This gives a natural selection pressure towards milder strain as the number of potential hosts suddenly falls below thresholds just as should happen with vaccination if it's done effectively

    • Like 4
  5. On 20/01/2020 at 00:59, DaveL said:

    That's one of the things that put me off getting a 24h FARS so I opted for a DFARS in the end, which retains open slats all around it and performs quite well when the fan is off. In certain conditions, I suspect that it performs better with the fan off, though I can't prove it - but the throughput of air seems to be quite low when it's running so that may be an issue.

    I did get that set-up for mine but the fan seemed to seize up after a couple of years, they aren't cheap so don't intend replacing - the fan itself isn't too bad but no telling if something else hasn't stopped too.

  6. Since the recordings were made just down the road at Glaisdale I guess it might have been felt here but I didn't notice anything despite being awake.
    The 2008 Market Rasen one was much bigger (5.2) but further away, it did give us quite a marked jolt followed by gentle shaking for a good minute - enough to rattle items indoors. Anyone not asleep (it was shortly after midnight) ought to have noticed it but local geology can have marked effect either deadening movement or enhancing it..

    • Like 2
  7. This started to become an issue a few years ago with the result that if you change your T/H sensor now you might not be informed (I wasn't) by vendor.
    Basically older VP2 stations will need a significant -0.5C offset if you get the current sensor.
    There are probably a few of the older ones floating about so care needed.

    Luckily less than three months data affected here before correction made, it's not realistic to backdate the correction though.

    logo516whiteandnavy-round.png
    WWW.MANULA.COM

    General Description *During 2016 and with the introduction of ‘AS’ revision VP2 models, Davis switched to using the Sensirion SHT31 T/H sensor. This...

     

  8. 21 hours ago, 4wd said:

    The lightest evenings often have some patchy cloud, which reflects sunlight for quite a while after sunset - rather like a natural lantern.

    This evening  afternoon there's a slightly unearthly yellow glow from a cloud layer illuminated from below.
    Clouds are quite high with some breaks to the west.

  9. On 27/11/2019 at 18:51, I remember Atlantic 252 said:

    80's even better of course, but don't remember them

    The late 80s winters had several  periods overcast with winds from the deep SW and very mild, for days on end

  10. It would be much better to get hold of a normal alloy scaffolding pole and somehow attach it to the wall with spacing if need be to clear guttering etc.
    Such a set up is relatively easy to 'walk' up and down for maintenance which could be needed more or less annually.
    The roof ridge line has a significant speeding up effect similar to aircraft wing.
     It would be way too easy to do minor but expensive damage to the roof mucking about round there too.
    The only safe way to be on a roof is with proper roof ladder secured in place.

  11. Worth noting the true solstice is about 4am tomorrow, in fact the 22nd will be a massive 1 second shorter than today.
    By Christmas you can just about notice the extra five minutes or so before sunset.

    The short days and general gloom are the worst thing about winter in the UK, but through January the return of light starts to accelerate quite rapidly
    By February given a calm sunny day it suddenly becomes noticeable the power is returning.

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