View allAll Photos Tagged Calibration
Fir engraver-caused mortality located during field work in preparation for the 2018 aerial survey Calibration and Conformity training. Recer Creek Road, Washington.
From Karen Ripley: "The aerial observers from Washington, Oregon and the newest hire in the fold Jackie Pope, who will be working in California, met in Ellensburg, Washington for “Calibration and Conformity” training. It was a great opportunity to review new policies, contracting, safety and logistics for the 2018 season, as well as practice the techniques for recording damage with DMSM tablet units. California used DMSM extensively in 2017. Oregon and Washington used this software for the Swiss Needle Cast survey in 2018. Increasing the number of observers who are doing the surveys and moving from a single agent (SNC) to many agents, points and polygons, defoliation and mortality, across diverse terrain made the need to discuss techniques and approaches to recording damage and hone skills particularly critical for 2018. The sessions included flying and mapping along a pre-planned route over several forest types (with associated damage present) and then comparing/discussing the resulting maps and data during a subsequent field trip to those sites. Glenn Kohler and Justin Hof, with help from Darci Dickinson and Connie Mehmel, located and measured the featured field sites, so deserve enthusiastic appreciation for their support towards excellent aerial survey data acquisition."
For more about the Region 6 aerial survey program see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: Justin Hof
Date: May 29, 2018
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
A repro (with color film calibration approximation to match) of the color test pattern of Washington, DC station WTTG (Channel 5). This custom layout dates to about 1976, when the station started using various weights in the Antique Olive family for their on-air ID's and print promos; the outer outlined '5' was a variant of then-parent Metromedia's proprietary 'Metromedia Television Alphabet' font which it would continue to use for more than a year (up to fall 1978) after New York sister station WNEW-TV (now WNYW) changed their logo in early 1977. As from a TV DX site which no longer exists.
...and saying "hello world" after completing calibration and movement tests (live video). There's around 500 lines of C code at this point, implementing initial calibration, event-loop driven motor control, display handling, sensor control, and diagnostics.
Inventory:
* Motors: 2 x Mabuchi RF-300FA-12350
* Position / rotation sensors: Toshiba TLP841, Optek OPB609
* Distance sensors: 2 x LV MaxSonar EZ4 (not yet installed)
* Motor drivers: 2 x Fairchild FAN8082
* MCU: ATmega 644P
* Display: Newhaven NHD-0216K1Z-NSB-FBW-L (HD44780-compatible)
* Supply: 7.4V 800 mAh LiPo (not yet installed)
* Supply adjustment: Murata OKR-T3-W12-C + Maxim MAX8212
This will eventually live on a PCB mounted in the center of the platform (and the battery will go in the rear); the LCD will be replaced with a smaller 8x2 module from the same manufacturer.
All plastic parts cast in Innovative Polymers IE-3075 polyurethane (includes 15 spur gears); tires cast in ShinEtsu KE-1310ST silicone. Also features four ball bearings, 16 dowel pins, 1 steel rod, and about 30 machine screws.
I started working on this design about a month ago - initial prototype here. The first redesign involved improving the strength of the platform and some aesthetic / dimensional tweaks to the geometry, as well as making room for a new li-poly battery in place of the originally planned alkaline 9V one. The next round switched OPB620 sensors for new, smaller TLP841 units found on Mouser; and used a different mount to accommodate OPB609 in place of the originally planned QRD1114. Another two rounds of machining involved changing the location and layout of calibration patterns on the gearwheels, and tweaking the clearance for the rear axle. Finally, I cycled through about 4 different color schemes. All in all, 3 weekends wasted. Yuck.
I already have a long list of things I would change about this design; for example, I am tempted to essentially flip the geometry over, and then move only the distance sensors and motors to the top side - improving ground clearance and adding more room for PCBs. I also scored some cool new motors to play with... Or, I bought some rectangular rods that would be a push-on replacement for the non-serviceable, glue-requiring round one used for the rear axle; and would like to increase the maximum turning angle by improving the clearance for front wheels.
That said, I am trying to force myself to finish it before pursuing a new iteration; we'll see.
As for the purpose of this design, uhh... to experiment with a proper turning mechanism in place of differential drive; to build a low-power, quiet drivetrain (this one runs near the optimum efficiency of the motors, which is rare); to learn ATmega internals (my first "real" project using this MCU); to play with ultrasonic rangefinders (I had them for a while in my drawer); to amuse children and scare cats.
More seriously, mapping out the surroundings using dead reckoning and then detecting changes and chasing moving objects seems like a good idea. No idea how well it's going to work.
Background neutralization
Color Calibration
SCNR (type=0, amount=1.00, preserve=true)
Histogram Transf. (mid=0.003, lo=0.007, hi=1.000)
Asinh Transformation: (stretch= 1.0, bp=0.16760)
Crop (x=75, y=91, w=3939, h=2663)
Background extraction (Correction: Subtraction)
Asinh Transformation: (stretch= 1.0, bp=0.05587)
Saturation enhancement (amount=1.00)
The finished camera.
I checked calibration of the rangefinder with aground glass on the film plane. There was no double image.
I disassembled the RF and discovered that one prism had become unglued, rendering it opaque. I re-glued by capillary action with Gum Arabic (not Canadian Balsam, but it seems to work). I had to make some adjustments to align the images vertically, by small strips of electrically tape under the prism assembly mounting brackets. Someone in a user group said that if they don't align vertically,the camera is not repairable. I disagree.
Horizontal alignment was correct (probably because I had adjusted it a year ago). I cleaned all optically surfaces and re-assembled the RF.
DSC_5157nef
Colour calibration profiles in Adobe Lightroom have been bugging me for a while and was one of the reasons why I've tended to stick to Nikon Capture NX for colour critical work. So take one wet Saturday afternoon when playing catch-up with a backlog of things and a X-Rite Colorchecker Passport to quickly generate a custom dual illuminant calibration for the camera.
A single image imported into Adobe Lightroom at default settings except a linear tone curve and white balance re-evaluated using the second grey patch. Virtual copies then made to allow the Camera Calibration to vary.
Typically I've used Camera DX2 Mode 2 as a base line for any work in Adobe Lightroom, from this experiment it was interesting to see how much more contrasty this setting is to all the other standard Nikon Picture Control emulations.
I've been tweaking my Skeinforge settings, but so far the ones I've found to work best are pretty close to the defaults that ship with ReplicatorG 0023 for the Thing-o-Matic
This image shows how to do calibration during Brinell hardness testing. The check that the machine is giving accurate results is done by making a hardness test on a standard block. The hardness value measured is compared against the certified hardness of the standard block. Courtesy of Roger White and Derrick Hurley, Bradford College.
My Zorki 4K camera and its Jupiter-8 1:2 f=50 mm normal lens clearly needed a calibration of its range finder. It is a very easy task for the infinite, acting on a small adjustment screw located at the front, left to the finder window. This film is a test of the focusing capability now much more efficient. There still a tiny shift that I will try to optimize soon following the known protocols (tomtiger.home.xs4all.nl/zenrep/calibration.html)
The camera was loaded with a CineStill Double XX (cine film Eastman 5222) exposed for 200 ISO using a Minolta Autometer III lightmeter fitted with a 10° viewfinder for selective measuring privileging the shadows. After exposure the film was processed using Tetenal Ultrafin developer at dilution 1+20 for 12 min and 20°C.
Rue de Bissardon, September 9, 2022
69300 Caluire-et-Cuire-et-Cuire
France
After process the film was digitalized using a Sony A7 body and a Minolta Slide Duplicator with a Minolta Auto Bellows III with a lens Minolta Bellow Macro Rokkor 50mm f/3.5.
About the camera :
This camera was manufactured in 1977 by KMZ company ( Красногорский механический завод, Krasnogorskiy Mechanicheskiy Zavod) located in the Moscow region. KMZ also manufactured the ZENIT SLR's among many other productions. Zorki 4K was produced between 1972 to 1978 and the previous Zorki models were inspired by the Leica II since 1949. This model 'Made in USSR" is branded in roman characters, intentionally for exportation. Other Zorki 4K were also branded in Cyrillic as "Зоркий". Zorki 4K was sold basically either with this Jupiter-8 lens 1:2 f=50mm or the Industar lens1:3.5 f=50mm. The Jupiter-8 is a Sonnar Zeiss optical formula and fits to the Zorki body using the screwing M39 Leica mount.
Its was sold to me in August 2022 from Austria with its original ever-ready leather bag, a front lens cap and a small shade hood accessory Minolta D42KA. The shade hood and filter of my Focaflex also fit to the Jupiter lens (Leica standard 42 mm filter)
Kamal Sarabandi holds radar calibration targets at the “anechoic chamber” in his lab. These are targets with know radar cross section values.
The anechoic chamber is used to characterize antennas and measure radar cross section of different targets. This chamber is designed to simulate a free-space environment where signals radiated from sources within are all absorbed by the foam materials attached to the walls.
Kamal Sarabandi (Persian: کمال سرابندی) is an Iranian-American scientist and the Fawwaz T. Ulaby Distinguished University Professor of EECS and the Rufus S. Teesdale endowed Professor of Engineering at the University of Michigan, where he teaches and conducts research on the science and technology of microwave and millimeter wave radar remote sensing, wireless technology, electromagnetic wave propagation and scattering, metamaterials, antenna miniaturization, and nano antennas.
Professor Kamal Sarabandi has had a distinguished and exemplary career as an educator and entrepreneur, focusing on the field of applied electromagnetic and microwave remote sensing. He is known for his seminal contributions to the science and technology of radar remote sensing for imaging the Earth's surface. His pioneering work on design of polarimetric radars, development of sophisticated electromagnetic scattering models for natural targets and their inverse solutions for monitoring vegetation, soil moisture, and snow has had important implications today for better understanding of processes that lead to global warming. He was the first to establish the connections between the incoherent and coherent domains of radar polarimetry.[1] Sarabandi served as Director of the Michigan Radiation Laboratory in the Department of Electrical Engineering and Computer Science at the University of Michigan (2000-2021).
Kamal Sarabandi holds a number of patents and is a founder/co-founder of several companies.
Thursday, May 11, 2023.
Photo by Marcin Szczepanski/Lead Multimedia Storyteller, Michigan Engineering
Aerial Survey program Calibration and Conformity field training. L-R: Aleksandar Dozic (WDNR), Ben Smith (USFS), Glenn Kohler (WDNR), Amy Ramsey (WDNR) and Melissa Fischer (WDNR). Near Ellensburg, Washington.
From Karen Ripley: "The aerial observers from Washington, Oregon and the newest hire in the fold Jackie Pope, who will be working in California, met in Ellensburg, Washington for “Calibration and Conformity” training. It was a great opportunity to review new policies, contracting, safety and logistics for the 2018 season, as well as practice the techniques for recording damage with DMSM tablet units. California used DMSM extensively in 2017. Oregon and Washington used this software for the Swiss Needle Cast survey in 2018. Increasing the number of observers who are doing the surveys and moving from a single agent (SNC) to many agents, points and polygons, defoliation and mortality, across diverse terrain made the need to discuss techniques and approaches to recording damage and hone skills particularly critical for 2018. The sessions included flying and mapping along a pre-planned route over several forest types (with associated damage present) and then comparing/discussing the resulting maps and data during a subsequent field trip to those sites. Glenn Kohler and Justin Hof, with help from Darci Dickinson and Connie Mehmel, located and measured the featured field sites, so deserve enthusiastic appreciation for their support towards excellent aerial survey data acquisition."
For more about the Region 6 aerial survey program see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: Justin Hof
Date: June 14, 2018
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Old fir engraver caused mortality surrounds one spot of new fir engraver activity. Only the active spot would be recorded in the 2018 survey data. Seen from Road 115 near Blewett Pass, Washington. Aerial Survey Program's Calibration and Conformity field training.
The active spot is highlighted here: www.flickr.com/photos/151887236@N05/28076147837/in/datepo...
For more about the Region 6 aerial survey program see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: Justin Hof
Date: June 14, 2018
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
(slidescan) Parked in front of the RLS buildings on 16 january 1984 is the last remaining HFB-320 Hansa-Jet of the RLS (Rijksluchtvaartschool = Government Flying School). © Bert Visser
Fir engraver caused damage surrounds one spot of mountain pine beetle in white pine. Seen from Road 115 near Blewett Pass on the Ellensburg side in Washington. Aerial Survey Program's Calibration and Conformity field training.
The active spot is highlighted here: www.flickr.com/photos/151887236@N05/42945663571/in/datepo...
For more about the Region 6 aerial survey program see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: Justin Hof
Date: June 14, 2018
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Aerial Survey program Calibration and Conformity field training. L-R: Aleksandar Dozic (WDNR), Danny Norlander (ODF), Melissa Fischer (WDNR), Christine Buhl (ODF), Amy Ramsey (WDNR), Glenn Kohler (WDNR), and Wyatt Williams (ODF). Near Ellensburg, Washington.
From Karen Ripley: "The aerial observers from Washington, Oregon and the newest hire in the fold Jackie Pope, who will be working in California, met in Ellensburg, Washington for “Calibration and Conformity” training. It was a great opportunity to review new policies, contracting, safety and logistics for the 2018 season, as well as practice the techniques for recording damage with DMSM tablet units. California used DMSM extensively in 2017. Oregon and Washington used this software for the Swiss Needle Cast survey in 2018. Increasing the number of observers who are doing the surveys and moving from a single agent (SNC) to many agents, points and polygons, defoliation and mortality, across diverse terrain made the need to discuss techniques and approaches to recording damage and hone skills particularly critical for 2018. The sessions included flying and mapping along a pre-planned route over several forest types (with associated damage present) and then comparing/discussing the resulting maps and data during a subsequent field trip to those sites. Glenn Kohler and Justin Hof, with help from Darci Dickinson and Connie Mehmel, located and measured the featured field sites, so deserve enthusiastic appreciation for their support towards excellent aerial survey data acquisition."
For more about the Region 6 aerial survey program see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
Photo by: Justin Hof
Date: June 14, 2018
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Two of my recent [debayered]master flat and master dark files. They have only been modified by auto-stretching the histograms in PixInsight and saved as JPG.
The Radiometer Calibration Facility at the Southern Great Plains.
Terms of Use: Our images are freely and publicly available for use with the credit line, “Image courtesy of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) user facility.”
Radiometers cover the roof of the Radiometer Calibration Facility.
Terms of Use: Our images are freely and publicly available for use with the credit line, “Image courtesy of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) user facility.”
I built this board to calibrate ultrasonic transducers in a psychiatry lab at UNC Chapel Hill. A powerful microcontroller provides the source and monitoring of the ultrasonic signal which is amplified before being used for calibration. The research for which this is used helps us understand the human brain and developmental neurology!
Aerial observer Calibration and Conformity training. Back row, left-to-right: Daniel Huerta (R5 seasonal surveyor), Zack Heath (USFS R5), Glenn Kohler (WDNR), Ben Smith (USFS), Charlie Schrader-Patton (RSAC DASM contract support), Mike McWilliams (ODF + airport cat), J.D. Mullen (FHTET), Jeff Mai (FHTET), Jim Baranek (ODF pilot), Bob Schroeter (USFS), Trevor Courtney (ODF pilot), Jason Coonta (R5 seasonal surveyor), Kevin Buxton (BC Ministry of Forests).
Front row, left-to-right: Rob Flowers (ODF), R5 seasonal surveyor (not identified), Amy Ramsey (WDNR), Jeff Moore (WDNR), and Keith Sprengel (USFS).
Photo by: Unknown
Date: June 25, 2008
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
For geospatial data collected during annual aerial forest insect and disease detection surveys see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
For related historic program documentation see:
archive.org/details/AerialForestInsectAndDiseaseDetection...
Johnson, J. 2016. Aerial forest insect and disease detection surveys in Oregon and Washington 1947-2016: The survey. Gen. Tech. Rep. R6-FHP-GTR-0302. Portland, OR: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. 280 p.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Plustek OpticFilm 120 Pro Scanner
Screenshot during use of Plustek Lens Calibration Tool.
This is a separate program from Plustek which is NOT integrated in the Silverfast scanning software.
As can be seen the 35mm film strip holder is automatically recognized.
Further more one has to choose :
- between Positive or Negative
- Place of the target in the holder
- Max.Res(olution) Yes/No . Standard resolution is 2650dpi. Max. resolution is 5300dpi
In this case I used an USAF 1951 high resolution film as a target.
Pesticide sprayer calibration unit test
For more information on this and other resources, please visit extension.psu.edu/pesticide-education
Where trade names appear, no discrimination is intended, and no endorsement by
Penn State Cooperative Extension is implied.
Photos by Garo Goodrow, Multimedia Specialist
Penn State Pesticide Education Program
© The Pennsylvania State University 2014
My Zorki 4K camera and its Jupiter-8 1:2 f=50 mm normal lens clearly needed a calibration of its range finder. It is a very easy task for the infinite, acting on a small adjustment screw located at the front, left to the finder window. This film is a test of the focusing capability now much more efficient. There still a tiny shift that I will try to optimize soon following the known protocols (tomtiger.home.xs4all.nl/zenrep/calibration.html)
The camera was loaded with a CineStill Double XX (cine film Eastman 5222) exposed for 200 ISO using a Minolta Autometer III lightmeter fitted with a 10° viewfinder for selective measuring privileging the shadows. After exposure the film was processed using Tetenal Ultrafin developer at dilution 1+20 for 12 min and 20°C.
Rue Célu, September 9, 2022
69004 Lyon
France
After process the film was digitalized using a Sony A7 body and a Minolta Slide Duplicator with a Minolta Auto Bellows III with a lens Minolta Bellow Macro Rokkor 50mm f/3.5.
About the camera :
This camera was manufactured in 1977 by KMZ company ( Красногорский механический завод, Krasnogorskiy Mechanicheskiy Zavod) located in the Moscow region. KMZ also manufactured the ZENIT SLR's among many other productions. Zorki 4K was produced between 1972 to 1978 and the previous Zorki models were inspired by the Leica II since 1949. This model 'Made in USSR" is branded in roman characters, intentionally for exportation. Other Zorki 4K were also branded in Cyrillic as "Зоркий". Zorki 4K was sold basically either with this Jupiter-8 lens 1:2 f=50mm or the Industar lens1:3.5 f=50mm. The Jupiter-8 is a Sonnar Zeiss optical formula and fits to the Zorki body using the screwing M39 Leica mount.
Its was sold to me in August 2022 from Austria with its original ever-ready leather bag, a front lens cap and a small shade hood accessory Minolta D42KA. The shade hood and filter of my Focaflex also fit to the Jupiter lens (Leica standard 42 mm filter)
Daniel Hartsock, SGP associate site scientist, describes the radiometer calibration facility to meteorology students from Rutgers University.
Terms of Use: Our images are freely and publicly available for use with the credit line, “Image courtesy of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) user facility.”
97-0094 DOE photo by Lynn Freeny
New calibration service at Y-12 Plant Oak Ridge Tennessee 2-28-1997
pro secret: Calibrate Your Display
Show the World Your True Colors
I can work confidently on a properly color-calibrated screen and can assert greater control over the color fidelity of my digital photo process. Photos can be reliably assessed and adjusted on a properly calibrated display, enabling true-to-life reproduction of my photos.
Why Calibrate Your Display ?
- Displays render the same image differently: Calibration tunes your display to a reference standard and brings color consistency across desktop, laptop, multiple displays, iPad and iPhone.
- Displays change over time: Recalibration returns it to reference state for brightness and color
- Prints often do not match display: Display calibration provides a base for better print matching
- Wide gamut displays may be oversaturated: Without calibration even wide-gamut displays may be inaccurate.
- Highlight and shadow details may be inaccurate: Control of brightness, white point and tone response with calibration.
- Image colors are not true to life: After calibration, images can be viewed and edited with confidence
you can buy it from Adorama or Amazon
I buy all my photo gear from Adorama, they are the best in the business, they have international shipping, superb costumer service and best prices, some times i order from Amazon too, they sell everything you can imagine, they have outstanding costumer service and best prices.
An autofocus calibration tool that I made of Lego. I figure it should work much better than a sheet of paper at a 45 degree angle from the imaging plane.
The red cylinder is seen through the hole in the center of the target. I found it helpful to focus on the closest part of the cylinder to get a better view of its position. It needs to be in the center of the hole to make the imaging plane parallel with the target plane. Assuming the lens provides a flat plane of focus (none actually do), this will make the distance scale useful, if you can use one that measures distance in studs times the square root of 2.
Title: Technician at work, Optics Calibration Department, Varian Techtron, 679 Springvale Road, Mulgrave
Author / Creator: Sievers, Wolfgang, 1913-2007 photographer.
Date: 1974
Varian Techtron was the result of a merger between the Australian company Techtron and the American firm Varian Associates in 1967. The Springvale Road site (then in Springvale North, but now in Mulgrave) was established by Techtron and is still in use, but now as Agilent Technologies (which acquired Varian in 2009). Techtron Appliances was established in 1938 and it and its successor companies have produced a variety of electronic and analytic equipment for industry and scientific research, notably including Atomic Absorption Spectrophotometers (AAS) to CSIRO specifications.
See locale on Google Maps.
Subjects:
Varian Techtron Employees.
Atomic absorption spectroscopy Calibration.
Atomic absorption spectroscopy Instruments.
Laboratory technicians.
Laboratories Victoria Mulgrave.
Optical spectrometers.
Portrait photographs.
Gelatin silver prints.
Index terms:
Australia; Victoria; Wolfgang Sievers; optical spectrometers; laboratory technicians; Mulgrave; Varian Techtron; atomic absorption spectroscopy
Notes: Job number inscribed in pencil on reverse of image: 4314 Z
Vintage print with the photographer's studio stamp on reverse.
Title taken from information supplied by Varian Australia, courtesy of the photographer.
Printed by Wolfgang Sievers at an unknown date from his negative made in 1974.
Copyright status: This work is in copyright
Conditions of use: Copyright restrictions apply.
For Copyright queries, please contact the National Library of Australia.
Source: SLV
Identifier(s): Accession no: H2000.195/242
Source / Donor
Purchased 2000.
Series / Collection
Wolfgang Sievers collection.
Link to online item
handle.slv.vic.gov.au/10381/308733
Link to this record
search.slv.vic.gov.au/permalink/f/1fe7t3h/SLV_ROSETTAIE18...
search.slv.vic.gov.au/permalink/f/1fe7t3h/SLV_VOYAGER1757457
A Franke & Heidecke LV-Source.
This equipment was used for the re-calibration of exposure meters.
Probably factory-made equipment for the external serviceworkshops.
Quite modern because there are already LEDs used. My guess is somewhere in the nineteen-seventies or -eighties.
Aerial observer Calibration and Conformity (C&C) training. Left to right, back row: Jeff Moore (WDNR), Dave Bridgwater (USFS), Suzanne Wiley (USFS), Tim McConnell (USFS), Mike McWilliams (ODF), Keith Sprengel (USFS), Unidentified, Dave Overhulser (ODF). Front row, left to right: Yolanda Barnett (USFS), Karen Ripley (WDNR), Roy Magelssen (USFS).
Photo by: Unknown
Date: c.1997
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection.
For geospatial data collected during annual aerial forest insect and disease detection surveys see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...
For related historic program documentation see:
archive.org/details/AerialForestInsectAndDiseaseDetection...
Johnson, J. 2016. Aerial forest insect and disease detection surveys in Oregon and Washington 1947-2016: The survey. Gen. Tech. Rep. R6-FHP-GTR-0302. Portland, OR: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. 280 p.
For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: wfiwc.org/content/history-and-resources
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth