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#calibration

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💧🌏 Greg Cocks

Consolidated Standardized Survey-Grade Checkpoints 3DEP 2010 to 2017 [USGS]
--
sciencebase.gov/catalog/item/6
--
“One of the key aspects of 3DEP data is that data is verified by a collection of certified survey-grade GNSS checkpoints spread throughout each project. These points have always been available but were difficult to find and not standardized. [The USGS] have collated and standardized almost 42,000 of these checkpoints and are making them available for other uses. These points here in this first phase span from 2010-2017, but [the USGS] are in the process of making these available for all [their] projects, and hope to enable them in different ways in the future...”
#GIS #spatial #mapping #USGS #USA #elevation #opendata #remotesensing #LiDAR #ifSAR #3dep #3dhp #water #hydrology #3d #opendata #3dtnm #checkpoint #checkpointdigital #GNS #GPS #NGD #DEM #survey #surveygrade #accuracy #precision #calibration #digital #NGTOC #NAD83
@USGS

screen shot - the 40k± Consolidated Standardized Survey-Grade Checkpoints 3DEP 2010 to 2017
image / map - LiDAR shaded relief (sic) of Tennessee area
image - graphical representation of farmland made with LiDAR and other datasets
image - LiDAR data of trees and ground surface
Continued thread
Public *
Julien :ve: 🔭:python:

Flat calibration frames are used in astrophotography to correct optical "defects" in the imaging train like vignetting and dust on the filters or camera sensor.

Multiple images of a uniform light source are taken and combined (averaged) into a master flat frame. Then each frame taken from the target is divided by the normalized intensity of the master flat frame on a pixel per pixel basis. This way, areas that are darker on the master flat frame, like corners when vignetting is present, are made brighter in the calibrated frames and vice-versa.

#astrophotography#calibration
Public
Blake Patterson

@nolen @derSammler I spent two hours (after finding an instruction vid) adjusting the resistor screw in the middle of the drive's ribbon cable, checking the resistance and aiming for about 0.77, and could not get consistent operation. It works here briefly, but it was not consistent.

youtube.com/shorts/iQoxF-jcTdw

I see ODEs require their own surface mount pin pulling, etc. and I'd rather not go in for that.

Is there no place that sells a pre-adjusted, proper replacement drive for this thing? I'd rather keep this, my orig PSX which I modded myself than buying another unit, hoping its drive lasts a while. Oy.

YouTubeTuning the laser on a replacement drive for the PlaystationBy Blake Patterson
#playstation#PSX#PSOne
Public *
*_jayrope
Oktava MK-012-01 hypercardiod microphones, matched pair, calibration protocols below - two coordinate systems, each for one mic, measurements from 20Hz to 20KHz in 0° (top), 90° (center) and 180° (bottom) phases.

How can i scan this and have values read into a text file, like
Freq Vol
20 0,00
23 0,04
...
20000 -12,2

? Is there a software for this type of thing?

Note: for actual speaker calibration I'll use omnis, of course.



@audiopro group #mastering #calibration #oktava
Oktava MK-012-01 hypercardiod microphones, matched pair, calibration protocols - two coordinate systems, each for one mic, lines values from 20Hz (left) to 20KHz (right) in 0°, 90° and 180° phases.
#oktava
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