here are the radar meteor recordings for October, the Draconids and Orionids being the main showers of the month although hampered by poor visibility again, although the all sky camera did pick a possible Draconid on the 10th Oct ( see earlier post re:BASMO).
The results for 2016 are also included as a comparison, although rates lower, similar pattern around the Draconids and Orionids.
I have included a summary of the showers during the month to compare with the recordings.
The final image shows false readings on the radar set up, the trace is the direct signal from Graves, due to atmospheric conditions. At 46Hz above zero line, which should represent the Graves frequency, it shows that the Funcube offset is 346Hz and not 300Hz that I had been using, will adjust this for the November series.
November sees the Leonids in the early hours of the 17/18, luckily it’s a new moon, lets hope for clear skies!
||September 24-October 9
||Sept. 30-Oct. 4
below are the daily and hourly rates for meteors this month, average daily count of 48 and av hourly count of 2. No major showers,
Next month the Orionids peaking on 21st, the activity is already at 80+ counts with the Sextantids (daylight shower) and the Eta Cetids and October Cetids all active at the start of October.
September Meteors: Minor Activity
A little after the event, but has taken time downloading / checking data after my eclipse chasing.
The daily rate shows a peak on the 12th August, however checking out the hourly rate shows the maximum hourly rate occurred on the 13th August at during 7 – 8 am with a max of 30 meteors. The maximum activity on each day was concentrated in the pre dawn hours.
I noticed the odd perseid in the USA but being a lot further south the radiant was a lot lower in the sky, quite close to horizon, which made life difficult when dark spots were usually surrounded by trees! With early starts each day it wasn’t feasible to wait into the early hours.
Below is data on rest of showers during August, September offers only minor showers.
||August 14-September 12
Here is the July meteor data based upon radar backscatter from Graves. As commented by http://meteorshowersonline.com/july_radiants.html
“Although the July radiants do not individually produce strong rates, activity from the Aquarius and Capricornus regions in July and early August, as well as minor activity from other radiants, cause hourly rates to basically rise between the middle and end of July for observers in both the Northern and Southern Hemispheres. Therefore, clear, moonless nights can be quite enjoyable for anyone observing during late July. “
there is a definite increase in activity towards end of month, where we are also entering the Perseid stream ( July 23 – Aug 22nd) and there has been a noticeable increase in fireballs picked up by NASA all sky monitors ( see Spaceweather.com)
I have also combined last years daily counts with this years for comparison:
although the count rates vary, there is some mirroring of variation early in the month, but there appears to be an increase rather than decrease in activity during the latter stages of the month. Notice also the diurnal nature of activity, particularly during the second half of the month, where activity is very high during the early hours of the day ( see Hourly meteor rate) .This is a good pointer to observing the Perseids later this month, with peak activity from midnight , through the early hours of the 12-13 Aug, a waning Gibbous moon will be rising around midnight which might interfere with viewing, but it stays relatively low in the sky as the Perseid radiant climbs higher. The shower is active from July 23 till Aug 22nd with best views during the nights of the 11, 12 and 13 Aug. Definitely worth getting those all sky cameras we have made up and running to record shower activity.
below is the daily and hourly rates of meteor detection using Graves radar signal, no major showers this month, month started with continued high count from end of May, then varied with combination over various showers overlapping during month, possible Graves “down time ” early in the month, from morning of 2ndJune to morning 3rd June.
April: the Lyrids towards end of month were just noticeable, with varying activity from minor showers overlapping over the month.
May started with a continuation of the lower activity detected at end of April, before the marked increase due to the Eta Aquarids, there was a noticeable increase in activity over the rest of the month with activity from minor showers overlapping and the activity of the day time showers showing up prominently on the hourly recording, greater activity before midday on most days.
It will be interesting to see if any of the radar detections can be matched visually once I’ve got the all sky camera up and running, I will be running Dimension4 to synchronise times on both machines, enabling a match to be made to visual and radar sightings.
Look out for the June Lyrids 15-16 June, although just after full moon and the nights will be a lot shorter.
Radio observations 1-6/5/2017 at Lichfield Radio Observatory
Link below is for PDF file:
Radio Observing Log LRO 010517-060517
Success at last!
In spite of all the positive posts around meteor radio scatter I have posted recently, one thing I had not managed to do was to use my FunCube Dongle Pro Plus software defined radio – this has been my aim as I do not wish to leave my (expensive) Yaesu FT-817 turned on and plugged in long term.
Today, is the first time I have managed to that using Dell E6400 laptop, Spectrum Lab software, USB 1 extension cable, FunCube Dongle Pro Plus, Bill Watson’s feeder cable, Bill Watson’s Slim Jim aerial tuned to 143.049MHz on 4 poles mast outside log cabin at LRO (4 old trampoline steel poles – total height 4-5m).
The following link gives an account of my success and suprising failure with same setup using rear mounted Moxon tuned to 2m band (rich text file):
Radio Observing Log Dell E6400 010517@0907
Configuration file used on Spectrum Lab for above detections:
Meteor Detection 2017-05-01@0838(Dell E6400) (this is a ZIP file – WordPress will not allow the extension to be attached to this entry without being zipped first – to use this unzip the file and save the configuration file in your Spectrum Lab configuration folder).
This successful use of the FunCube Dongle Pro Plus occurred with both FunCube Dongle Pro Plus and Yaesu tuned to 149.049MHz. I used SDR Sharp to set upper side band on FunCube and Yaesu also on upper side band.
Meteors detected using above setup between 08:27 & 09:17 (gives idea of frequency and how successful this has been):