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Garlic prep

Sep24
by catz on September 24, 2020 at 09:04 and modified on September 24, 2020. at 09:09
Posted In: gardening, garlic

dounle line of irrigation tape per row

This years 2020 garlic harvest was better than average. We harvested across a few weeks, as it came ready, and finished in early August. After drying in the leanto for 4 weeks, we cut off the tops, cut off the roots, cleaned up the bulb and then weighed and measured its size using a garlic sizing template.

We are now (still) in the process of transcribing that data to get averages across the 90 odd types that we grew this past season.
I am of the opinion that the drip tape irrigation system contributed to the better than average harvest. We typically watered for 2 hours every day or every other day during the hot dry season in June and July. Then we stopped irrigation closer to harvest, letting the garlic start to dry.

Garlic was in Vegbed4 last season and will be going into Vegbed5 this season, as we always rotate the crops from bed to bed each year. The tomatos are still there at this time but we hope to clear the bed this weekend.
There will be a lot of tomatos and seeds in that bed when we are done so we start to prep the bed for a mid to late October planting of garlic cloves.

Saturday we hope to clear the bed of tomatos, then till it over to loosen up the soil and give the weed seeds (or in this case tomato seeds) a chance to germinate and grow a bit with the rains that are coming Sunday and Monday. After a couple of weeks (now into early October), we will lay down as many bags of composted sheep and cow manure that we can find (up to 20) and till the bed again, mixing it in while killing off the weeds (and tomatos) that have since grown.

Then a week or three later, just before the day we determine to plant, we will cultivate it (a shallower pass this time) just to get the weeds out.
String lines will be laid out, and this time 2′ between beds not the 1′ of last year. This is to help keep the bed in a straight line. It was a little too tight to walk down the beds.

We plant around 1000 bulbs, which we will have spent 3 or 4 evenings prior, precracking the bulbs to get out the cloves, of the seed garlic that we have selected even earlier. It makes for a nice few hours in the garage drinking wine while opening up the bulbs. They go into individually labelled paper bags.
We also gather up a master list of types, print off laminated labels to staple onto 1″x2″ x1′ stakes that mark each row.

On the day of planting we use a dibbler, a 2×4 with 6 wooden dowels spaced 6″ apart to create 6 planting holes at once, in a straight line. Then the next 6 are put in 8″ away and so on and so on. We get about 24/ 2/3 or 36 rows in each bed. Each bed is 30″ wide plus 24″ for a path gives approx 4.5′ for each bed and path. That goes into a 25′ vegbed5 six times giving us room for a total of 6*36*6=1296 cloves. Once each bed is complete, the string line gets moved over to the next bed.

Bag labels are double checked, cloves go in the hole, are raked over and the namestake pushed in at the path end of the row. Over and over again until we can take no more. This usually takes many hours on a nice morning, then a few more in the afternoon.

Finally, straw is set out, lightly covering the garlic to protect it through the winter, mostly from the freeze/thaw cycle that sometimes occurs in midwinter.

Hopefully the garlic will have a couple of weeks to germinate, establish some roots before the next heavy frost hits and stays.

You can also plant in spring after the ground has thawed. We have done this as well and basically the garlic is 2-3 weeks behind in development over a fall planting.

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Jupiter 2020sept20

Sep21
by catz on September 21, 2020 at 11:24 and modified on October 21, 2020. at 14:44
Posted In: astronomy

Another night of imaging with the Meade 102mm SC on the Meade LXD55 equatorial mount in the Serenity Observatory.  Started with realigning by hand the OTA on the dovetail, as it had slipped.  Need to take it off and tighten that single point of attachment sometime, but not last night and not just before a session.

Powered up the mount, told it to do a two star alignment, using Arcturus and Mizar.  Used the new two holer Hartmann mask to focus on Mizar and low and behold, resolved the double star and it was quite sharp.  The Hartmann mask came off  and told it to go to Jupiter, and it did get  close, within the 1/2 degree of the innermost Telrad circle.  Found it.  Added the dew shield and started imaging runs, two 30sec first then 180second runs.  The seeing appeared average but the transparency poor.  I was not happy with the ongoing image, so after 3 runs, fiddled with the focus.  It got worse 🙁

While processing the images I noticed the Great Red Spot… on the wrong hemisphere.  I then remembered that for some reason the equatorially mounted scope, after the 2 star align, went to Jupiter and was upside down from its normal orientation.  Wonder why that happened?  So in Irfanview, I rotated the image 180 degrees and all was good again.

But on the other hand, updated images of the scope and observatory are annotating well.  Still no successful imaging of Mars yet…

Below is an animated compilation of all 6 or 7 imaging runs:

 

 

Todo: resecure the OTA to the Dovetail, lower the tripod slightly as its new height is touching the closed roof.

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SCGO Headlamp Review

Sep13
by catz on September 13, 2020 at 10:37 and modified on September 13, 2020. at 10:57
Posted In: astronomy

Headlamps are a wonderful invention. From harvesting veg after sunset to working in the dark with astronomy. One requires white light and the other requires red light.
White light makes it easier to see with your higher resolution day vision, and red light preserves your lower resolution and lower light level night vision.
In astronomy we use the red light exclusively until the end of the session when we often use white light to find dropped bits of equipment on the ground.
Headlamps also give you the ability to keep both hands free and aim the light where you need it. Most headlamps have adjustable straps, some better than others, and the ability to tilt the lamp downward in increments.
Most headlamps only all you to cycle through the various modes: bright white, less bright white, red, flashing red.
This causes a problem for astronomers. From off, to get to red you must cycle through two settings of white light. This affects not only your vision but also those around you, resulting in curses and threats.  And typically the light will be on until you put your eye to the eyepiece, at which time you must turn it off.  Then when leaving the eyepiece, you generally turn it on again.

So here follows a review of three models of headlamp.

1) basic $10 From amazon.ca
Sunix® LED Headlamp with Adjustable Headband And Angles Perfect for Running, Dog Walking, Fishing, Biking, Camping, Watching Nature – 4 Light Modes With 3x CREE R3 + 2 Red LED, Waterproof IPX-6, 3 x AAA battery (Not included)
Sold by: Nexo-CA
This is a general purpose LED headlamp that works well. It’s biggest drawback is the cycling through white light modes to get to the red light. Recommended for the price point alone and the fact that it is still working two years later. These seem to be a generic headlamp sold under many retail names.

2) Cabellas inova touch switch headlamp. I thought this would be perfect… a nonmoving switch that allows you to go directly to red light or white light and not have to cycle through the white. It was much more expensive but most of Cabellas (Ottawa) equipment is quality. What a piece of *^@#$%@#$. First off, you can never remember which way to swipe across the surface to get red. It is simply not pressing a spot but a motion.

But the killer was, the switch rarely works. It often takes 10 swipes before it activates. And then sometimes it does in fact activate at a touch, when you are adjusting the downward tilt for instance. Very frustrating, dislike with a passion.

3) The newest and greatest: vekkia from amazon.ca
Ultra Bright CREE LED Headlamp – 160 Lumens, 5 Lighting Modes, White & Red LEDs, Adjustable Strap, IPX6 Water Resistant. Great for Running, Camping, Hiking & More. Batteries Included
Brand: Vekkia
4.6 out of 5 stars 2,661 ratings | 7 answered questions Amazon’s Choice for “headlamp red” Price: CDN$ 16.99
This one has TWO touch switches white on the left, red on the right. white modes inclide: bright, less bright, flashing.
The red modes include: bright and flashing

 

Summary: Until a dual switch white/red headlamp comes along *WITHOUT FLASHING mode* #3, the Vekkia model, is the recommended best headlamp for astronomers.

 

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Jupiter 2020sept11

Sep12
by catz on September 12, 2020 at 14:51 and modified on September 13, 2020. at 11:02
Posted In: astronomy

Friday evening was the first nice clear skies in over a week. So we were out observing and imaging. by 9pm the temp had dropped to 6.6C, below the predicted low of +7C. In the end it went down to +0.7C just before sunrise.
Weather forecasting is not even close!

So.. this is Jupiter at azimuth 178, almost due south, as good as it will get this year, at 2020 sept 12, 00:48 UTC or 2020 sept 11 20:48 EDT. It took 30 minutes to find Jupiter in the Meade 102mmSC on the Meade LSX55 mount. I ended up increasing the height of the tripod so I could go around back outside of the observatory (4’x4′) and look through the telrad.
That did not work out as the mount tripod leg started to slip.
After securing that again, I went inside the observatory and limbo’d under the counterweight arm to get in behind the scope to peer through the telrad.

Finally nailed it, used a two hole Hartmann mask to attempt a good focus, but it looked pretty poor all in all.
Note to self: Make another Hartmann mask. This one is too big and the two holes impinge on both the secondary mirror and the outside of the corrector plate.

With Firecapture and the ZWO ASI 290MC camera, I took a 30 second imaging run with image brightness around 70%, giving a 66ms exposure, with no autoalignin gand a region of interest of around 600×600 pixels.
Then I took another with autoalign turned on. This helps give me a record of the seeing that night.
Things looked good. The mount was not tracking well so I was manually guiding corrections every 30 seconds or so.
Then I moved up to a 120sec run, correcting guiding again about every 30 seconds.
The 120 sec was the limit I used on the older 20cm meade lx200gps.. but then I realized that was because of its higher resolution and the max time before a surface feature moved from one pixel to the next.
On this smaller scope, I should be able to do longer imaging runs without that happening.
So I bumped it up to 180 seconds, more frames per run allowing for better stacking.

In the event the dew fell, the corrector plate fogged over and I called it a night after only 11 runs in total.
Note to self – build a small dew shield.
I am toying with the idea of building a slightly larger imaging observatory. 4’x4′ gross is just a little too small.

So.. without further , here is the best of Jupiter last night, serendipitously capturing a shadow transit of the satellite Europa and Europa itself on the upper right of Jupiter.

And an animated .gif of the 11 images of the night

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Observatory Power

Sep09
by catz on September 9, 2020 at 10:34 and modified on September 9, 2020. at 10:47
Posted In: alternative power, tech

Some questions came up locally about power, quality of power and their affect on astronomy equipment.

Have you considered a whole house surge protector on your main panel?
I think it would be $300-400 $Can but may require a spare/empty circuit breaker location.

Power to our observatory starts at the back deck on a GFCI (Ground Fault Circuit Interruptor) jack, then a buried 50′ 16gauge extension cord to the observatory.
Then a UPS to help bring up the voltage if need be (it would charge up the UPS battery during low demand and discharge the battery and bump up brownout/low voltage during higher demand).

The rest of the observatory is powered through that (LED lights, white lights, telescopes, laptop, 12vdc battery charger, netbook and supersid radio telescope).

Then *another* 50′ extension cord (16 gauge?) out to the tardis observatory, where another UPS is there to support.
That runs the torus telescope, torus computer, LED lighting red and white, imaging laptop).

From there *another 50′ extension cord runs out to the Serenity observatory. No UPS there.. we ran out of them.
It runs a laptop, the radiojove radio telescope and the telescope mount.

When we build *another* larger observatory out in the back, I think it will be about time to dig up the 16 gauge power cables and replace them with heavier 14 gauge or 12 gauge ones.

So.. get a UPS with a small battery -maybe 7AH at least) (you are not using it for long term power but rather filtering and support (brownouts and low voltage) when needed. You also get a software package that lets you log power events (serious ones, not minor noise), but in general there are RFI filters in the UPS as well.

One of the units is an APC BackUPS Pro 1000 which has gigabit rated network surge proection jacks, 4 surge jacks, 4 UPS Battery Backup jacks. Non critical equipment is plugged into the surge-only jacks (ie the 12vdc battery charger, etc).

The UPS is to be able to let you:
1) see when the power/lights go out
2) save your computer from a sudden crash (most of our laptops are old and the laptop batteries are no good anymore)
3) allow you to park your scope and shutdown your computer.
The biggest use of all is surge protection, brownout protection and RFI filtering.

* please note that items are secured and locked, video surveillance is onsite along with some active deterrence measures as well *

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Saturn 20200906

Sep07
by catz on September 7, 2020 at 17:46 and modified on September 7, 2020. at 17:56
Posted In: astronomy

Saturn is another favourite target and this again was the first imaging run in weeks, possibly since opposition.

With very heavy processing the Cassini division just comes out, but there is also a lot of fluffy noise around the rings. Being only a 30 second exposure with only 159 frames and using only 20% of those, it is no wonder there is so much noise.

And since there were only two imaging runs of Saturn before the mount decided to meridian flip yet again, and I stopped for the night, it is almost not worth posting the animated .gif here:

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Jupiter 20200906

Sep07
by catz on September 7, 2020 at 17:10 and modified on September 7, 2020. at 17:19
Posted In: astronomy

It has actually been just 2 or 3 weeks since my last imaging night with Jupiter. This is in the early evening, maybe an hour after sunset and before Jupiter hits azimuth 180 due south. I am still using the tiny 102mm Meade SC on an older Meade LXD55 mount which needs constant guiding during the exposures.
I normally start with a 30 second un-autoaligned by firecapture, followed by a 30 sec autoaligned by firecapture, as it gives me an idea of the seeing that night. Then I launch into 120 second runs, the longest I can do without Jupiter rotating too much too fast.
This is actually the best image of the night… the very first 30 second image. Normally as a rule, the 120sec images are *always* better than the 30 second images… not in this case however.

Fewer number of images means more noise in general. Compare this image to the previous post of the next nights imaging run and you can see the difference.
Here the Great Red Spot is visible, The north and South Equatorial belts. Seeing was poor, transparency was average. Manual tracking/guiding was the norm.

Animated .gif:

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Jupiter 20200907

Sep07
by catz on September 7, 2020 at 16:35 and modified on September 7, 2020. at 16:59
Posted In: astronomy

Greetings!
After almost a month of being too busy in the gardens/cloudy nights, here is the best image from last night (Sunday 2020 Sept 06) in the evening.

Most of the image specs are in the actual image, annotated with the linux based ImageMagick utilities. I have been trying to figure out the best way to annotate text onto an image, especially with different scopes, barlows, fratios, etc.
I think I have finally hit upon a method. create a text file with all of the relevant info and use it. The altitude, diameter and magnitude would not change much in the space of an hours worth of imaging. The Central Meridian will change however… still working on that one.

UT Time
Altitude=22 deg Diameter=43.5″ Magnitude -2.5
CMI=148.9° CMII=84.1° CMIII=175.3°
Meade 102mm Schmidt-Cass f25 ZWO ASI290MC frames=best 20% of 1250
Kevin Kell SCGO-Serenity Observatory Yarker Ontario Canada

and also adding in the filename itself, which contains the UTC date and time along with exposure, camera, autostakkert alignment points, drizzle factor, and wavelet settings.

At the top left is an image of the actual telescope used
At the top center is the planetary image orientation (I am a north is up kinda fellow)
At the top right is the observatory used

Line one confirms UT time
Line two gives the approx altitude of Jupiter above the horizon along with its apparent diameter and magnitude (from stellarium)
Line three comes from firecapture text file and is the Jupiter Centrlal Meridian coordinates
Line four is the telescope, aperture, fratio (native F10 but using x2.5 barlow=f25), camera and the percentage of best frames out of the total number of frames taken.
Line five is the copywrite information about myself, which observatory these were based out of and the geographic location.

Lastly I create animations out of all of the images of the night and that is shown below (click on the image to see the animated .gif).

The linux bash script looks like this:
#!/bin/bash
#2020april28
#assumed image size is 750×750 and is .png
#2020aug17 change to serenity meade 102mm SC
echo starting annotation
echo removing spaces in filenames
for f in *\ *; do mv “$f” “${f// /_}”; done
echo change filename case to lower case
for file in * ; do lower=$(echo $file | tr A-Z a-z) && [[ $lower != $file ]] && mv $file $lower ;done
mkdir annotated
for i in *.png
do
echo start annotation on $i
echo add scope100 icon filename to a
composite -geometry +1+5 scope100.jpg $i a.png
echo add north icon a to b
composite -geometry +350+5 northisup.jpg a.png b.png
echo add obs100 icon b to c
composite -geometry +650+5 obs100.jpg b.png c.png
echo add text c to d
convert c.png -pointsize 14 -fill white -annotate +9+670 @annotation.txt d.png
echo add filename
convert -font helvetica -fill white -pointsize 14 \
-draw “text 10,650 ‘$i’ ” \
d.png $i-annotated.png
done
rm a.png
rm b.png
rm c.png
rm d.png
convert -delay 20 *annotated.png jupiter.gif
convert *annotated.png jupiter.mpg
mv *annotated.png annotated/

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Jupiter 2020 August 16 UTC

Aug17
by catz on August 17, 2020 at 08:37
Posted In: astronomy

Greetings!

Saturday night was imaging Jupiter with:

a) cleaned optics (camera window, barlow)

b) removed 90 deg adapter (gaining 10-20% in exposure times due to one less 80-90% reflective surface) AND one less Yaxis flip!

c) the x2.5 barlow (previous attempts have been x1.5 and x2

The Hartmann mask was used to focus on Vega, then moved to Jupiter for imaging.

Images runs were 120 second and exposure times were better than the 100ms the past few days, down to 90 and even 86ms.

These are the best 20% of the 1395 frames taken.

I’ve attempted to add the GIMP to the image workflow: black point, filter enhance highpass, filter enhance despeckle and colour saturation, but I can’t say any of these worked for me at all.

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Jupiter 2020 Aug 14 UTC

Aug17
by catz on August 17, 2020 at 08:36
Posted In: astronomy

>> Jupiter satellite events from project pluto
>> I = IO
> II = EUROPA
> III = GANYMEDE
> UTC-4 hours=EDT
>
> II : Tra start: 14 Aug 2020 11:36
> II : Sha start: 14 Aug 2020 13:03
> II : Tra end : 14 Aug 2020 14:23
> II : Sha end : 14 Aug 2020 15:52
> III: Tra start: 14 Aug 2020 23:30
>
> 22:30 EDT
> III: Sha start: 15 Aug 2020 2:30
> III: Tra end : 15 Aug 2020 2:51
> I : Tra start: 15 Aug 2020 3:23
> 00:08 EDT
> I : Sha start: 15 Aug 2020 4:08
> I : Tra end : 15 Aug 2020 5:40
> III: Sha end : 15 Aug 2020 5:54
> 01:54 EDT

This is an image of the shadow of the moon Ganymede (top left) and you can barely make out the moon itself leaving transit on the limb (right a little above middle).

I successfully used the two holer (hartman mask). I focused by eye first on Arcturus then used the mask and did see two distinct images, adjusted the focus until it was a good as possible, then removed the mask and slewed to Jupiter. I had tried using the mask on Jupiter but as a nonpoint source, it did not work at all.

Tracking was problematic and I had to manually guide the expos

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Jupiter Saturn 2020 Aug 13 UTC

Aug17
by catz on August 17, 2020 at 08:35
Posted In: astronomy

Another night of developing imaging workflow for the Meade 102mm SC. Tonight was with a x2 barlow, taking it from FL=1000mm to 2000mm.

This small Schmidt-Cassegrain telescope has only a small coarse focus knob to move the primary mirror in and out.

That combined with a x2 barlow, cut down the exposure times by x4, meaning every time you touch the focus knob, everything shakes and blurs and does not settle down for a few seconds.

So, focus was not the best. After last nights RASCKC weekly chat, I expect everyone to be out making Hartmann masks today… I know I did 🙂

This is the last or 2nd last image of the night, before I switched over to Saturn.

Jupiter was 21 deg alt, with a diameter of 46 arcsec. The Great Red Spot was appearing… I did not see that at all in the raw imaging. North is up.

I hope tonight will see a noticeable improvement in the initial focus… that helps all the way down the processing/ workflow chain.

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Jupiter 2020Aug12 02:48-03:14UTC

Aug12
by catz on August 12, 2020 at 10:48 and modified on August 12, 2020. at 10:51
Posted In: astronomy

Imaging Jupiter last night during the Perseids, waiting for midnight to come for hopefully better and more meteor displays.

These are before and after Registax v6 wavelet processing, to show the power behind wavelets, and the fact that I still do not have what I consider ideal settings 🙁

Seeing was average

Transparency was good but got worse

Sky Quality Meter reading: 21.48 mag/arcsec^2

Meade LXD55 mount tracking below average

Meade 102mm SC F10 FL=1000mm plus a x1.5x barlow, effective FL=1500mm
No dew shield or dew heater on the Meade 102.
North is down (I normally do up)
Thesee are the best 50% of the images.

Start of run 02:48UTC

End of run 03:14 UTC

Before wavelets

After wavelets

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