Why Venus is translucid? | |
Astromut
Senior Forum Moderator User ID: 14554787 United States 06/06/2012 03:32 PM Report Abusive Post Report Copyright Violation | It's just quantum efficiency hysteresis - the CCD's response to light depends on previous exposures, the end effect of which is a bit of ghosting which is quite noticeable here because of the sudden and drastic change from "bright" pixels to "dark" pixels due to Venus. This occurs due to back side charge accumulation ( [link to www.stsci.edu] - the front-side illuminated ccd referred to here does not belong to SDO). SDO's AIA CCDs are indeed back-illuminated CCDs ( [link to www.springerlink.com] ) and are therefore vulnerable to this problem. For the Venus transit, they went to great lengths to make the image cadence even higher than normal, which allowed less time for the charge accumulation to dissipate between exposures than it would during normal operations. Quoting: Astromut Wonder how long before someone cries shill because this logical explanation doesn't jive with their mentally unstable viewpoints... They already did on another thread of this same subject. |
Daniel of the Rose
User ID: 995731 United States 06/06/2012 03:42 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 3910757 United States 06/06/2012 03:45 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 3910757 United States 06/06/2012 03:48 PM Report Abusive Post Report Copyright Violation | It's just quantum efficiency hysteresis - the CCD's response to light depends on previous exposures, the end effect of which is a bit of ghosting which is quite noticeable here because of the sudden and drastic change from "bright" pixels to "dark" pixels due to Venus. This occurs due to back side charge accumulation ( [link to www.stsci.edu] - the front-side illuminated ccd referred to here does not belong to SDO). SDO's AIA CCDs are indeed back-illuminated CCDs ( [link to www.springerlink.com] ) and are therefore vulnerable to this problem. For the Venus transit, they went to great lengths to make the image cadence even higher than normal, which allowed less time for the charge accumulation to dissipate between exposures than it would during normal operations. Quoting: Astromut Thank you, learned something today Astro is a SHILL! |
Daniel of the Rose
User ID: 995731 United States 06/06/2012 03:49 PM Report Abusive Post Report Copyright Violation | |
Coyoxautli
(OP) User ID: 17494689 Mexico 06/06/2012 03:59 PM Report Abusive Post Report Copyright Violation | It's just quantum efficiency hysteresis - the CCD's response to light depends on previous exposures, the end effect of which is a bit of ghosting which is quite noticeable here because of the sudden and drastic change from "bright" pixels to "dark" pixels due to Venus. This occurs due to back side charge accumulation ( [link to www.stsci.edu] - the front-side illuminated ccd referred to here does not belong to SDO). SDO's AIA CCDs are indeed back-illuminated CCDs ( [link to www.springerlink.com] ) and are therefore vulnerable to this problem. For the Venus transit, they went to great lengths to make the image cadence even higher than normal, which allowed less time for the charge accumulation to dissipate between exposures than it would during normal operations. Quoting: Astromut Thank you, learned something today Astro is a SHILL! It´s no wonder USA have economic problems, I thought NASA had ULTIMATE technology. fucking chinese CCD´s By the way call Industrial Light and Magic for better effects with tears streaming down my face. You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother's eye. |
Himbe Uhuru 7 User ID: 9376555 United States 06/06/2012 04:38 PM Report Abusive Post Report Copyright Violation | It's just quantum efficiency hysteresis - the CCD's response to light depends on previous exposures, the end effect of which is a bit of ghosting which is quite noticeable here because of the sudden and drastic change from "bright" pixels to "dark" pixels due to Venus. This occurs due to back side charge accumulation ( [link to www.stsci.edu] - the front-side illuminated ccd referred to here does not belong to SDO). SDO's AIA CCDs are indeed back-illuminated CCDs ( [link to www.springerlink.com] ) and are therefore vulnerable to this problem. For the Venus transit, they went to great lengths to make the image cadence even higher than normal, which allowed less time for the charge accumulation to dissipate between exposures than it would during normal operations. Quoting: Astromut Thank you, learned something today Astro is a SHILL! The way to prove it is a shill is to ask it to publically post it's thought on building 7 If you get a response like it was "accelerated collapse high energy muslim physics" well at least you have a professional's expert analysis |
Anonymous Coward User ID: 17292991 United States 06/06/2012 06:40 PM Report Abusive Post Report Copyright Violation | It has an atmosphere, petrolium base, like Naptha. Quoting: HnryBwmn I would think light is being refracted (bent) around it. Being as close as it is light rays from the sun are covering alot of it closely, all the way around, illuminating it's atmosphere. Did you mother drop you more than 18 times as a baby? You got the wrong planet man |
Anonymous Coward User ID: 18725395 Italy 06/28/2012 04:47 AM Report Abusive Post Report Copyright Violation | In the sequence which starts at 1:04 why can you can see the sun through the planet? Quoting: Coyoxautli [link to www.youtube.com] And Venus (or the earth) was wobbling as well: [link to api.ning.com] |