Comments (5)
Right.
from desimodel.
Ok, thanks. I normally think of an amplifier gain as (output signal) / (input signal), but I'm glad the units are correct at least.
from desimodel.
I've always advocated re-naming the quantity that astronomers use as the "loss".
At least then the meaning is no longer ambiguous.
from desimodel.
The amplifier gain is (output signal) / (input signal) since in real life it is used to convert raw ADU (amplifier digital units) coming out of the CCDs into electron units, upon which we do the rest of the calculations. i.e.
electrons = (raw data CCD ADUs) * gain
It only seems backwards because our simulations are in electrons (photons) and then we divide by the gain to get back to really really raw ADU data. specter jumps through some hoops to ensure that we get the integerization right at the photon (electron) shot noise, and then it is converted into ADU and re-integerized like the CCD electronics do, and then re-multipled by the gain to get the final "electrons" that one would work with for extractions. I welcome review of that logic, however.
from desimodel.
Ok, but the input signal to the front-end hardware amplifier is electrons (from e-h pairs) collected on a CCD gate, not ADUs.
from desimodel.
Related Issues (20)
- update xy2radec and radec2xy to support airmass field compression terms
- Add focalplane model support for stuck / broken position
- Add support for CANbus failures in focalplane model HOT 1
- Use instrument database for generating focalplane model HOT 2
- update/deprecate fiberpos.fits HOT 6
- DESIMODEL SVN data? HOT 2
- Update platescale to as-built design from DESI-4037 HOT 2
- Mechanism for getting current "nominal" focalplane HOT 1
- Convert focalplane model times to UTC
- Update throughput model to include dip between 4300 and 4500A HOT 3
- Add information about fibers with low transmission
- Outdated desimodel test branches. HOT 1
- astropy 5 not compatible with focalplane calibration ecsv HOT 13
- desiInstall desimodel branches/main fails
- Remove fix-tiles branch? HOT 1
- update psf-quicksim HOT 3
- Update api.rst
- Problem with new version of numpy HOT 5
- io.load_tiles defaults to old tile list $DESIMODEL/data/footprint/desi-tiles.fits HOT 6
- Error with get_tile_radius_deg when loading platescale HOT 4
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from desimodel.