CCD kamery pro úzkopásmovou fotografii

[Konihlav]

Kdyz OSC test, tak OSC test. MMysovo stara, hranata QHY8, gain 0, offset 120:

OSC-CCD Camera Measurement:
---------------------------
Gain = 0.52
Readout Noise = 11.27e-
Total System Noise = 12.28e-

[Konihlav]

a zpet k mono, test G4-16000:

CCD Camera Measurement:
-----------------------
Gain = 1.45
Readout Noise = 8.74e-
Total System Noise = 9.73e-

jediny problem jsem mel s flaty, kdy jsem musel 3 z 5ti smazat (byly tam videt artefakty z mechanicke zaverky - je treba aby MMys fotil delsi expozice na flat), tudiz presnot mereni gainu trochu utrpela (tipuji mozny rozdil tak +-0.05 misto +-0.01 ocekavane odchylky), ale presto si myslim, ze hodnoty opravdu odpovidaji ocekavani, takze je to OK

teplota cipu -20 podle FITs hlavicky.

[Sasa3]

Pavle ten gain je v e- na ADU a nebo ADU na 1e-?

[Konihlav]

v e- na ADU.

[MMys]

jediny problem jsem mel s flaty, kdy jsem musel 3 z 5ti smazat (byly tam videt artefakty z mechanicke zaverky - je treba aby MMys fotil delsi expozice na flat), tudiz presnot mereni gainu trochu utrpela (tipuji mozny rozdil tak +-0.05 misto +-0.01 ocekavane odchylky), ale presto si myslim, ze hodnoty opravdu odpovidaji ocekavani, takze je to OK Smiley
jejda, já jsem to kůň, jsem ti poslal flaty z té špatné sady, kde blbla závěrka. On je to zatím takový poloprodukt (předek G3 namontovvaný na zdek G4 )

[Konihlav]

Vysledky mereni kamery Jirky Buchala podrobnosti nastaveni teplota gain offset prozradi Jirik sam:

kompletni log output z meho skriptu:

reading BIAS frame Bias1-15_01.tiff
reading BIAS frame Bias1-15_02.tiff
reading BIAS frame Bias1-15_03.tiff
reading BIAS frame Bias1-15_04.tiff
reading BIAS frame Bias1-15_05.tiff
reading BIAS frame Bias1-15_06.tiff
reading BIAS frame Bias1-15_07.tiff
reading BIAS frame Bias1-15_08.tiff
reading BIAS frame Bias1-15_09.tiff
reading BIAS frame Bias1-15_10.tiff
reading FLAT frame Flat-1-850ms-0-C0.tiff and FLAT frame Flat-1-850ms-1-C0.tiff
gain#1 = 0.42200
reading FLAT frame Flat-1-850ms-1-C0.tiff and FLAT frame Flat-1-850ms-2-C0.tiff
gain#2 = 0.42404
reading FLAT frame Flat-1-850ms-2-C0.tiff and FLAT frame Flat-1-850ms-3-C0.tiff
gain#3 = 0.42319
reading FLAT frame Flat-1-850ms-3-C0.tiff and FLAT frame Flat-1-850ms-4-C0.tiff
gain#4 = 0.42226
Gain = 0.42287
reading BIAS frame Bias1-15_01.tiff
StdDev#1 = 13.90189ADU
reading BIAS frame Bias1-15_02.tiff
StdDev#2 = 13.80481ADU
reading BIAS frame Bias1-15_03.tiff
StdDev#3 = 13.87553ADU
reading BIAS frame Bias1-15_04.tiff
StdDev#4 = 13.54199ADU
reading BIAS frame Bias1-15_05.tiff
StdDev#5 = 13.73507ADU
reading BIAS frame Bias1-15_06.tiff
StdDev#6 = 14.09136ADU
reading BIAS frame Bias1-15_07.tiff
StdDev#7 = 13.59363ADU
reading BIAS frame Bias1-15_08.tiff
StdDev#8 = 13.77158ADU
reading BIAS frame Bias1-15_09.tiff
StdDev#9 = 13.82547ADU
reading BIAS frame Bias1-15_10.tiff
StdDev#10 = 13.67699ADU
StdDev = 13.78183ADU
Readout Noise = 5.82796e-
reading BIAS frame Bias1-15_01.tiff
StdDev#1 = 14.52053ADU
reading BIAS frame Bias1-15_02.tiff
StdDev#2 = 14.53713ADU
reading BIAS frame Bias1-15_03.tiff
StdDev#3 = 14.34546ADU
reading BIAS frame Bias1-15_04.tiff
StdDev#4 = 14.78618ADU
reading BIAS frame Bias1-15_05.tiff
StdDev#5 = 14.50521ADU
reading BIAS frame Bias1-15_06.tiff
StdDev#6 = 14.95361ADU
reading BIAS frame Bias1-15_07.tiff
StdDev#7 = 14.62832ADU
reading BIAS frame Bias1-15_08.tiff
StdDev#8 = 14.36887ADU
reading BIAS frame Bias1-15_09.tiff
StdDev#9 = 14.36334ADU
reading BIAS frame Bias1-15_10.tiff
StdDev#10 = 14.82578ADU
StdDev = 14.58344ADU
Total System Noise = 6.16694e-

OSC-CCD Camera Measurement:
---------------------------
Gain = 0.42
Readout Noise = 5.83e-
Total System Noise = 6.17e-

[Konihlav]

Vysledky mereni kamery Martina Taxe (ma jiny nastaveni a je videt, ze gain (ne ten z driveru, ale realny cisla z fitsu) je cca polovicni nez je optimum):

reading BIAS frame Bias_Borg_QHY_0ms_0.tiff
reading BIAS frame Bias_Borg_QHY_0ms_1.tiff
reading BIAS frame Bias_Borg_QHY_0ms_2.tiff
reading BIAS frame Bias_Borg_QHY_0ms_3.tiff
reading BIAS frame Bias_Borg_QHY_0ms_4.tiff
reading FLAT frame Flat_Borg_QHY_red-1-25ms-0-C0.tiff and FLAT frame Flat_Borg_QHY_red-1-25ms-1-C0.tiff
gain#1 = 0.19446
reading FLAT frame Flat_Borg_QHY_red-1-25ms-1-C0.tiff and FLAT frame Flat_Borg_QHY_red-1-25ms-2-C0.tiff
gain#2 = 0.19521
reading FLAT frame Flat_Borg_QHY_red-1-25ms-2-C0.tiff and FLAT frame Flat_Borg_QHY_red-1-25ms-3-C0.tiff
gain#3 = 0.19394
reading FLAT frame Flat_Borg_QHY_red-1-25ms-3-C0.tiff and FLAT frame Flat_Borg_QHY_red-1-25ms-4-C0.tiff
gain#4 = 0.19385
Gain = 0.19437
reading BIAS frame Bias_Borg_QHY_0ms_0.tiff
StdDev#1 = 45.28685ADU
reading BIAS frame Bias_Borg_QHY_0ms_1.tiff
StdDev#2 = 46.19305ADU
reading BIAS frame Bias_Borg_QHY_0ms_2.tiff
StdDev#3 = 46.37028ADU
reading BIAS frame Bias_Borg_QHY_0ms_3.tiff
StdDev#4 = 46.28046ADU
reading BIAS frame Bias_Borg_QHY_0ms_4.tiff
StdDev#5 = 46.34121ADU
StdDev = 46.09437ADU
Readout Noise = 8.95919e-
reading BIAS frame Bias_Borg_QHY_0ms_0.tiff
StdDev#1 = 50.86671ADU
reading BIAS frame Bias_Borg_QHY_0ms_1.tiff
StdDev#2 = 51.45676ADU
reading BIAS frame Bias_Borg_QHY_0ms_2.tiff
StdDev#3 = 51.64543ADU
reading BIAS frame Bias_Borg_QHY_0ms_3.tiff
StdDev#4 = 51.14007ADU
reading BIAS frame Bias_Borg_QHY_0ms_4.tiff
StdDev#5 = 51.17857ADU
StdDev = 51.25751ADU
Total System Noise = 9.96273e-

OSC-CCD Camera Measurement:
---------------------------
Gain = 0.19
Readout Noise = 8.96e-
Total System Noise = 9.96e-

BTW moje shitka zatim nic moc, ale nemel jsem dnes vubec cas se tim zabyvat a merit pro me vhodne nastaveni... tak snad zitra bo pozdeji.

[Konihlav]

P.S.: obe predchozi kamery jsou QHY8L.

kluci dotaz - mate zapnuty nebo vypnuty "CLAMP" nastaveni v driveru ???

P.S.#2: nastaveni GAIN = 0 (v driveru) je MMys dogma (jiz dnes neplati).

jo a jeste mam Orion StarShoot ProV2 vysledky:

reading BIAS frame biassave Image -001B.tiff
reading BIAS frame biassave Image -002B.tiff
reading BIAS frame biassave Image -003B.tiff
reading BIAS frame biassave Image -004B.tiff
reading BIAS frame biassave Image -005B.tiff
reading BIAS frame biassave Image -006B.tiff
reading BIAS frame biassave Image -007B.tiff
reading BIAS frame biassave Image -008B.tiff
reading BIAS frame biassave Image -009B.tiff
reading BIAS frame biassave Image -010B.tiff
reading FLAT frame flatsave Image -001FF.tiff and FLAT frame flatsave Image -002FF.tiff
gain#1 = 0.47962
reading FLAT frame flatsave Image -002FF.tiff and FLAT frame flatsave Image -003FF.tiff
gain#2 = 0.48022
reading FLAT frame flatsave Image -003FF.tiff and FLAT frame flatsave Image -004FF.tiff
gain#3 = 0.47863
reading FLAT frame flatsave Image -004FF.tiff and FLAT frame flatsave Image -005FF.tiff
gain#4 = 0.47978
reading FLAT frame flatsave Image -005FF.tiff and FLAT frame flatsave Image -007FF.tiff
gain#5 = 0.47929
Gain = 0.47951
reading BIAS frame biassave Image -001B.tiff
StdDev#1 = 29.44455ADU
reading BIAS frame biassave Image -002B.tiff
StdDev#2 = 29.31823ADU
reading BIAS frame biassave Image -003B.tiff
StdDev#3 = 28.88476ADU
reading BIAS frame biassave Image -004B.tiff
StdDev#4 = 29.99399ADU
reading BIAS frame biassave Image -005B.tiff
StdDev#5 = 29.67055ADU
reading BIAS frame biassave Image -006B.tiff
StdDev#6 = 30.17475ADU
reading BIAS frame biassave Image -007B.tiff
StdDev#7 = 29.07197ADU
reading BIAS frame biassave Image -008B.tiff
StdDev#8 = 29.04974ADU
reading BIAS frame biassave Image -009B.tiff
StdDev#9 = 30.40153ADU
reading BIAS frame biassave Image -010B.tiff
StdDev#10 = 30.14913ADU
StdDev = 29.61592ADU
Readout Noise = 14.20101e-
reading BIAS frame biassave Image -001B.tiff
StdDev#1 = 27.47182ADU
reading BIAS frame biassave Image -002B.tiff
StdDev#2 = 27.52327ADU
reading BIAS frame biassave Image -003B.tiff
StdDev#3 = 27.36333ADU
reading BIAS frame biassave Image -004B.tiff
StdDev#4 = 26.91877ADU
reading BIAS frame biassave Image -005B.tiff
StdDev#5 = 27.31074ADU
reading BIAS frame biassave Image -006B.tiff
StdDev#6 = 27.18254ADU
reading BIAS frame biassave Image -007B.tiff
StdDev#7 = 27.25782ADU
reading BIAS frame biassave Image -008B.tiff
StdDev#8 = 27.45773ADU
reading BIAS frame biassave Image -009B.tiff
StdDev#9 = 27.44470ADU
reading BIAS frame biassave Image -010B.tiff
StdDev#10 = 27.29324ADU
StdDev = 27.32240ADU
Total System Noise = 13.10126e-

OSC-CCD Camera Measurement:
---------------------------
Gain = 0.48
Readout Noise = 14.20e-
Total System Noise = 13.10e-



davam data sem do tohoto vlakna urceneho predevsim pro narrow band (na coz se OSC kamery sice moc nehodi, ale jde to s nimi a tak ma smysl mereni zkoumat i z jineho duvodu nez jen pro zabavu a zajimavost).

[Konihlav]

P.S.: ma-li nekdo nejakou CCD kameru a zajima-li ho cteci sum (jen jeden z mnoha dulezitych parametru), tak mi data muze poslat mailem (10x bias, chlazeny, 5x flat).

data z nechlazene, mnou opravene MII G1-0300 co mam z druhe ruky a ktere jsem o vikendu prenastavil gain/offset jsou jiz take konecne konzistentni (tj. ze vsechy 4 gainy z 5ti flatu mi vyjdou stejne a ne rozdilem x nasobku coz vetsinou ukazuje na chybu v kamere), jen vysledny cteci sum (diky teplote 25 v mistnosti) je 18.5e- ;D ;D oproti 4.7 ci 5.5 ze stejneho cipu chlazeneho Atika16ic ci nechlazene DSI III Pro.

toz decka howgh ;D

[Sasa3]

Nejak nerozumim tomu, proc by mel cteci sum zaviset tak silne na teplote. V principu by mohl, ale neslysel jsem o tom, ze by zavisel tak silne. Aspon u Atiku 314L jsem si niceho nevsimnul.

Typuji si, ze to, co meris je silne ovlivneno horkymi pixely. Tech ma Atik jen par a i ty jsem radeji pri mereni RMS vyloucil. U Kodak chipu je to vyrazne horsi. Zkus je nejak identifikovat, udelat si jejich mapu a vyloucit je. Pak dostanes ciste mereni vycitaciho sumu a i pri pokojove teplote by jsi mel namerit podobna cisla jako pri chlazeni na plny vykon. Bez toho odstraneni hot pixelu se jinak asi nedoberes ke kloudnemu cislu.

[Konihlav]

Sasa3: jak spravne podotykas, hotpixely a polo-hot-pixely a jiny bordel dela v mereni velkou paseku a proto ta silna zavislost vysledku na teplote - kdyz chladim dostatecne, bordel zmizi a mereni nabyva verohodnych vysledku. Takze dusledek a pricina spolu souviseji

[-karneades-]

brzo ti poslu data z G4 16000 , mimocodem, co jsi opravoval na te G1 ??

[Konihlav]

ta G1cka 0300 puvodne vlastnena MilANem, pak chvilku Tebou a pak mnou mi delala pri zaostrovani pointeru na jasnych (i mene jasnych) hvezdach nahodny (po vycteni noveho snimku jinde umistenych) vyber pixelu, ktery misto aby byly bily ci prepaleny, tak byly cerny jako bota. Proste hvezda mela nahodne pixely uplne cerne. Pointacni hvezda pak vypadala mnohdy tak, ze to byl krouzek ;D proste cerna tecka uprostred a okoli hvezda.

P. Cagas z MII rikal, ze to ukazuje na spatne nastaveny zisk kamery. Teorii jsem zatim neoveril, jen jsem kameru PRED a PO moji uprave firmwaru a nastaveni zisku promeril svym skriptem na mereni sumu kamer. Predtim byl zisk 8 a ted mam 50. El Senor Cagas rikal, ze G1 pointacni maji mit zisk cca 60.

mereni zisku PRED:
reading FLAT frame flat-001.tiff and FLAT frame flat-002.tiff
gain#1 = 0.01176
reading FLAT frame flat-002.tiff and FLAT frame flat-003.tiff
gain#2 = 0.03255
reading FLAT frame flat-003.tiff and FLAT frame flat-004.tiff
gain#3 = 0.02292
reading FLAT frame flat-004.tiff and FLAT frame flat-005.tiff
gain#4 = 0.03018
Gain = 0.02435


mereni zisku PO:
reading FLAT frame flat-001.tiff and FLAT frame flat-002.tiff
gain#1 = 0.32785
reading FLAT frame flat-002.tiff and FLAT frame flat-003.tiff
gain#2 = 0.32994
reading FLAT frame flat-003.tiff and FLAT frame flat-004.tiff
gain#3 = 0.33214
reading FLAT frame flat-004.tiff and FLAT frame flat-005.tiff
gain#4 = 0.32898
Gain = 0.32973

z vysledku jednotlivych snimku je videt, ze predtim byla ve vstupnich datech velka davka nahody intenzit signalu v pixelech, kdezto po uprave je zisk z 5ti flat fieldu nameren temer vsude stejny => stabilizovana data (tak jak to ma byt - opakovatelny vysledek a meritelny).

Jestli to ovsem resi problem nebo ne zjistim az nekdy prestane prset a budu zrovna mit cas (sance na to, aby se obe podminky sesly je minimalni). Ale do konce roku to snad stihnu overit.

Pokud to nepomuze, leti pointacni kamerka hodne rychle oknem ven do popelnice, pac na to ja nemam nervy (byt me to bude stat nekolik tisicovek).

G3 zatim trpi enormnim rosenim pruhy by mely byt uz poreseny, ale dosud jsem neudelal jediny dark snimek na test kalibrace (provedu snad do konce mesice).

toz tak.

[kolec]

To Konihlav


http://www.ulozto.cz/9779161/10xb-5xf-rar

10xbias + 5x flat field sbig 8300

Poprosil by som o vysledok

kolec

[Konihlav]

kolec:

reading BIAS frame Bias -001B1x1.tiff
reading BIAS frame Bias -002B1x1.tiff
reading BIAS frame Bias -003B1x1.tiff
reading BIAS frame Bias -004B1x1.tiff
reading BIAS frame Bias -005B1x1.tiff
reading BIAS frame Bias -006B1x1.tiff
reading BIAS frame Bias -007B1x1.tiff
reading BIAS frame Bias -008B1x1.tiff
reading BIAS frame Bias -009B1x1.tiff
reading BIAS frame Bias -010B1x1.tiff
reading FLAT frame flat-001.tiff and FLAT frame flat-002.tiff
gain#1 = 0.37947
reading FLAT frame flat-002.tiff and FLAT frame flat-003.tiff
gain#2 = 0.37859
reading FLAT frame flat-003.tiff and FLAT frame flat-004.tiff
gain#3 = 0.37914
reading FLAT frame flat-004.tiff and FLAT frame flat-005.tiff
gain#4 = 0.37906
Gain = 0.37907
reading BIAS frame Bias -001B1x1.tiff
StdDev#1 = 27.43748ADU
reading BIAS frame Bias -002B1x1.tiff
StdDev#2 = 27.66460ADU
reading BIAS frame Bias -003B1x1.tiff
StdDev#3 = 27.24698ADU
reading BIAS frame Bias -004B1x1.tiff
StdDev#4 = 27.30266ADU
reading BIAS frame Bias -005B1x1.tiff
StdDev#5 = 27.96819ADU
reading BIAS frame Bias -006B1x1.tiff
StdDev#6 = 27.55338ADU
reading BIAS frame Bias -007B1x1.tiff
StdDev#7 = 27.29547ADU
reading BIAS frame Bias -008B1x1.tiff
StdDev#8 = 27.37415ADU
reading BIAS frame Bias -009B1x1.tiff
StdDev#9 = 27.13193ADU
reading BIAS frame Bias -010B1x1.tiff
StdDev#10 = 27.70367ADU
StdDev = 27.46785ADU
Readout Noise = 10.41210e-
reading BIAS frame Bias -001B1x1.tiff
StdDev#1 = 29.75773ADU
reading BIAS frame Bias -002B1x1.tiff
StdDev#2 = 30.01942ADU
reading BIAS frame Bias -003B1x1.tiff
StdDev#3 = 29.72698ADU
reading BIAS frame Bias -004B1x1.tiff
StdDev#4 = 29.44497ADU
reading BIAS frame Bias -005B1x1.tiff
StdDev#5 = 29.93738ADU
reading BIAS frame Bias -006B1x1.tiff
StdDev#6 = 30.25418ADU
reading BIAS frame Bias -007B1x1.tiff
StdDev#7 = 29.55878ADU
reading BIAS frame Bias -008B1x1.tiff
StdDev#8 = 29.54647ADU
reading BIAS frame Bias -009B1x1.tiff
StdDev#9 = 29.52066ADU
reading BIAS frame Bias -010B1x1.tiff
StdDev#10 = 29.94176ADU
StdDev = 29.77083ADU
Total System Noise = 11.28508e-

CCD Camera Measurement:
-----------------------
Gain = 0.38
Readout Noise = 10.41e-
Total System Noise = 11.29e-



vetsina 8300 kamer ma tyto hodnoty (pres 10e-). Jediny MII ma fakt nizky sum, pak dlouho nic a Apogee, QSI, SBIG, dlouho nic Atik, FLI, dlouho nic, SX.

chtelo by to jeste jednu ST8300 pro porovnani.