The former Douglas airliner is a -72 model, and can stay airborne for 12 hours and has an operational speed between 3-hundred and 5-hundred knots (345-575mph, 555-926kph).
The research flights are made as low as 5-hundred feet (152 meters) and as high as 42-thousand feet (12-thousand-801 meters or 12.80 kilometers).
DC-8-72 on the ground in Chile after an 11 hours flight to study ocean ice, October 2009.
The information that came with this pic stated the DC-8 was being used to test alternative fuels in California, January 2009.
The DC-8-72 uses a plethora of electronic equipment for remote sensing scientific studies in archeology, ecology, geography, hydrology, meteorology, oceanography, volcanology, atmospheric chemistry, soil science and biology. The name of the organization/university conducting the study is sometimes painted on the forward section of the fuselage, underneath the Dryden Flight Research Center name.
Preparations for Operation Ice Bridge, Dryden Aircraft Operations Facility, California, late 2009. The cart full of computers is part of a Laser Vegetation Imaging Sensor, waiting to be installed on the DC-8.
Inside the DC-8 Airborne Laboratory, being configured for Operation Ice Bridge, 2009.
DC-8 on approach to Dryden Aircraft Operations Facility, November 2008.
From November 1999 to March 2000, the DC-8-72 joined a NASA U-2 (aka ER-2) for SAGE III Ozone Loss and Validation Experiment (SOLVE), in Sweden.
NASA-Armstrong DC-8 Airborne Science Laboratory sits on the east ramp of the 124th Fighter Wing, Boise, Idaho, 23JUL2019. Idaho Air National Guard photo by Master Sergeant Joshua C. Allmaras.
NASA’s aged and heavily modified DC-8 airliner is conducting air monitoring missions in relation to the growing wildfire danger in the western U.S.
Idaho National Guard A-10Cs in the foreground, NASA’s DC-8 FIREX-AQ takes off from Gowen Field (Boise Airport), 30JUL2019.
President Donald Trump is portrayed by the ‘main-stream’ news media as being anti-climate, yet since he became President of the United States NASA (National Aeronautics Space Administration) has seemingly increased its studies of the effects of pollution and wildfires (including prescribed burns and agricultural fires) on the atmosphere.
On 23JUL2019, NASA held an explainer day for Idaho news media, and as you can tell not many showed up. Idaho Air National Guard photo by Master Sergeant Joshua C. Allmaras.
Looking like chaff/flare dispensers these are actually Airborne-Synthetic Aperture Radar (AirSAR) antenna. NASA photo 26MAR1998.
NASA says their DC-8 flys at 42-thousand feet (12-thousand-801 meters or 12.80 kilometers) for as long as 12 hours, collecting air samples with the many antennae protruding from the fuselage.
FIREX-AQ sensors. Idaho Air National Guard photo by Master Sergeant Joshua C. Allmaras, 23JUL2019.
More sensors, Idaho Air National Guard photo by Master Sergeant Joshua C. Allmaras, 23JUL2019.
In 2016, the NASA DC-8 was in Korea conducting high-altitude monitoring of air quality, from Osan Air Base. U.S. Air Force photo by Technical Sergeant Travis Edwards, 27APR2016.
Video explainer of NASA’s DC-8 mission over Korea: