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Cloudy sky. LED and PAR sensors mounted on a tower
1538 DSCN0798.JPG (2007-08-31 17:32:12 ) Full size: 2048x1536
Cloudy sky. LED and PAR sensors mounted on a tower

From the top of flux tower. A pyranometer, net radiometer and PAR sensor
1548 DSCN0832.JPG (2007-08-31 18:18:49 ) Full size: 2048x1536
From the top of flux tower. A pyranometer, net radiometer and PAR sensor

Bird on the diffuse PAR boom
711 SI_webcam_2008057_0906.jpg (2008-02-26 09:06:04 ) Full size: 640x480
Bird on the diffuse PAR boom

Bird on diffuse PAR boom
752 SI_webcam_2008190_1737.jpg (2008-07-08 16:37:02 ) Full size: 640x480
Bird on diffuse PAR boom

PAR sensors twisted on the radiometer tram
391 20101007TZ_TiltedTramPAR.jpg (2010-10-07 12:13:24 ) Full size: 3648x2736
PAR sensors twisted on the radiometer tram

Temporary Floor net radiation and PAR sensors
417 TZ_051.jpg (2010-10-07 19:34:27 ) Full size: 1944x2592
Temporary Floor net radiation and PAR sensors

Bird on diffuse PAR boom
678 SI_webcam_20110401445.jpg (2011-02-09 14:45:02 ) Full size: 640x480
Bird on diffuse PAR boom

Diffuse PAR sensor, green pepper weed and grass
1040 20110513SI_Field.jpg (2011-05-13 09:44:47 ) Full size: 2560x1920
Diffuse PAR sensor, green pepper weed and grass

Rotating shadow band for diffuse PAR
1280 20110621SI_DiffusePAR1.jpg (2011-06-21 10:20:26 ) Full size: 2560x1920
Rotating shadow band for diffuse PAR

Rotating shadow band for diffuse PAR
1281 20110621SI_DiffusePAR2.jpg (2011-06-21 10:22:13 ) Full size: 2560x1920
Rotating shadow band for diffuse PAR

Rotating shadow band for diffuse PAR
1282 20110621SI_DiffusePAR3.jpg (2011-06-21 10:23:29 ) Full size: 2560x1920
Rotating shadow band for diffuse PAR

Diffuse PAR AC motor
1284 20110621SI_DiffusePARMotor.jpg (2011-06-21 10:38:49 ) Full size: 2560x1920
Diffuse PAR AC motor

Bird on diffuse PAR shadow band
2625 SI_autocam_20120501_1015.jpg (2012-05-01 10:15:03 ) Full size: 1920x1440
Bird on diffuse PAR shadow band

Bird on diffuse PAR shadow band
2644 SI_webcam_20121221015.jpg (2012-05-01 10:15:04 ) Full size: 640x480
Bird on diffuse PAR shadow band

Bird on diffuse PAR shadow band
2645 SI_webcam_20121240545.jpg (2012-05-03 05:45:04 ) Full size: 640x480
Bird on diffuse PAR shadow band

Bird on diffuse PAR shadow band
2629 SI_autocam_20120515_1015.jpg (2012-05-15 10:15:03 ) Full size: 1920x1440
Bird on diffuse PAR shadow band

Bird on diffuse PAR shadow band
2634 SI_autocam_20120604_0515.jpg (2012-06-04 05:15:07 ) Full size: 1920x1440
Bird on diffuse PAR shadow band

Bird on PAR sensor
3025 TW_autocam_20121002_0745.jpg (2012-10-02 07:45:02 ) Full size: 1920x1440
Bird on PAR sensor

Bird of prey on PAR
3537 TW_autocam_20130706_1645.jpg (2013-07-06 16:45:02 ) Full size: 1920x1440
Bird of prey on PAR

PAR sensor level
3688 20131018VR_LevelPAR.jpg (2013-10-18 09:49:07 ) Full size: 1920x1440
PAR sensor level

BF3 diffuse PAR sensor after leveling
3684 20131018VR_LevelBF3.jpg (2013-10-18 09:53:32 ) Full size: 1920x1440
BF3 diffuse PAR sensor after leveling

BF5 diffuse PAR sensor after leveling
3685 20131018TZ_LevelBF5.jpg (2013-10-18 12:10:18 ) Full size: 1592x1228
BF5 diffuse PAR sensor after leveling

PAR sensor was level
3690 20131018TZ_LevelPAR.jpg (2013-10-18 12:11:00 ) Full size: 964x832
PAR sensor was level

Rotating shadow band for diffuse PAR and radiometers at Tonzi
4220 20150415TZ_DiffusePAR1.jpg (2015-04-15 12:50:59 ) Full size: 1920x1440
Rotating shadow band for diffuse PAR and radiometers at Tonzi

Rotating shadow band for diffuse PAR
4221 20150415TZ_DiffusePAR2.jpg (2015-04-15 12:52:05 ) Full size: 1920x1440
Rotating shadow band for diffuse PAR

Newly installed diffuse PAR sensor with homemade rotating shadow band
4288 20151015TA_DiffusePAR.jpg (2015-10-15 13:34:16 ) Full size: 1920x1440
Newly installed diffuse PAR sensor with homemade rotating shadow band

A PAR sensor was installed under the alfalfa canopy to try to measure undercanopy PAR. The sensor is resting on a piece of foam and is protected on the sides by a PVC pipe.
5211 20200417BA_UndercanopyPAR.jpg (2020-04-17 16:20:00 ) Full size: 1920x1440
A PAR sensor was installed under the alfalfa canopy to try to measure undercanopy PAR. The sensor is resting on a piece of foam and is protected on the sides by a PVC pipe.

A PAR sensor was installed under the alfalfa canopy to try to measure undercanopy PAR. It is about 2.4m from the SW corner of the BA tower.
5210 20200417BA_UndercanopyPARInstall.jpg (2020-04-17 16:26:40 ) Full size: 1920x1440
A PAR sensor was installed under the alfalfa canopy to try to measure undercanopy PAR. It is about 2.4m from the SW corner of the BA tower.

Pile of mowed alfalfa was shading the undercanopy PAR sensor
5262 20200501BA_zPARShade.jpg (2020-05-01 16:08:46 ) Full size: 1440x1920
Pile of mowed alfalfa was shading the undercanopy PAR sensor

Undercanopy PAR sensor is an an unusually open part of the canopy. Maybe all my digging around in the multiple installations has affected alfalfa growth.
5307 20200821BA_zPAR.jpg (2020-08-21 14:23:22 ) Full size: 1440x1920
Undercanopy PAR sensor is an an unusually open part of the canopy. Maybe all my digging around in the multiple installations has affected alfalfa growth.

Comparing PAR sensors
5468 20210121TZ_PARCompare.jpg (2021-01-21 00:00:00 ) Full size: 1440x1920
Comparing PAR sensors

Undercanopy PAR sensor #2 in an open water location a few cm above the water
5519 20210330EE_ParUnder2.jpg (2021-03-30 17:10:11 ) Full size: 1440x1920
Undercanopy PAR sensor #2 in an open water location a few cm above the water

Undercanopy PAR sensor #3 in a heterogeneous litter layer. This sensor is about 30cm above the water level
5520 20210330EE_ParUnder3.jpg (2021-03-30 17:10:41 ) Full size: 1440x1920
Undercanopy PAR sensor #3 in a heterogeneous litter layer. This sensor is about 30cm above the water level

Undercanopy PAR sensor #1 above a patch of blown-down reeds
5518 20210330EE_ParUnder1.jpg (2021-03-30 17:14:58 ) Full size: 1440x1920
Undercanopy PAR sensor #1 above a patch of blown-down reeds

Location of undercanopy PAR sensors on south side of the tower. This is the view when looking down from the upper boardwalk. Undercanopy PAR #2 sensor is currently underwater.
5522 20210415EE_UndercanopyPAR.jpg (2021-04-15 15:51:06 ) Full size: 1920x1440
Location of undercanopy PAR sensors on south side of the tower. This is the view when looking down from the upper boardwalk. Undercanopy PAR #2 sensor is currently underwater.

Radiometer calibration kit installed on Hill Slough rad boom (4-way radiometer, Apogee NDVI pair, PAR). Note high winds blowing the loose cables sideways.
5545 20210609HS_RadCalKit.jpg (2021-06-09 18:45:36 ) Full size: 1440x1920
Radiometer calibration kit installed on Hill Slough rad boom (4-way radiometer, Apogee NDVI pair, PAR). Note high winds blowing the loose cables sideways.

Reference radiometers (4-way, PAR, NDVI pair) set up on EE rad boom for an intercomparison
5562 20210721EE_RadIntercomparison.jpg (2021-07-21 12:54:22 ) Full size: 1920x1441
Reference radiometers (4-way, PAR, NDVI pair) set up on EE rad boom for an intercomparison

Rotating shadow band set up on the top of Tonzi tower for an intercomparison with the Delta-T BF5 diffuse PAR sensor
6311 20230616TZ_RotatingShadowBand.jpg (2023-06-16 11:36:54 ) Full size: 1920x939
Rotating shadow band set up on the top of Tonzi tower for an intercomparison with the Delta-T BF5 diffuse PAR sensor

Some bird left parts of at least two crayfish in the tipping bucket
6699 20240314BC_LeftOverCrayfishParts.jpg (2024-03-14 10:45:46 ) Full size: 1440x1920
Some bird left parts of at least two crayfish in the tipping bucket

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