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Thailand’s Krabi Coast

2026-04-20 04:00

Strips of sandy beach line the coast of Krabi Province, Thailand, separating blue ocean water from inland greenery and urban areas.
March 23, 2026

Along the western coast of Southern Thailand, a series of bright tan beaches lines the Andaman Sea. These sandy expanses fill the gaps between the myriad other features touching the sea, from limestone karst towers to mangroves to built-up areas.

The OLI (Operational Land Imager) on Landsat 8 captured these images on March 23, 2026, showing part of the coastal area along Thailand’s Krabi Province. These beaches lie about 50 kilometers (30 miles) east of Phuket across Ao Phangnga, a bay of the Andaman Sea. The beaches are a tourism hotspot and draw visitors from around the world. 

Railay Beach and Phra Nang Beach, accessible by boat, are especially a draw for rock climbers who come here to scale the seaside walls of limestone. The towering formations are an iconic part of the region’s tropical karst landscape, resulting from the just-right ingredients of rock type and climate conditions.

Limestone in this region formed from the accumulation of calcium carbonate, the skeletal remains of marine organisms that settled here when the area was covered by a shallow sea hundreds of millions of years ago. Over time, continental collisions lifted the rock upward and shaped it into complex patterns. Rainwater, made slightly acidic due to the tropical environment, assisted in the chemical weathering that eroded the limestone, sculpting the rock into unique shapes. 

Aerial view of limestone towers protruding from seawater off the coast of Krabi Province, Thailand.
Limestone towers stand above the sea off the coast of Southern Thailand.
Photo by Shawn via Unsplash.
Alt text: A wide view of Krabi Province shows offshore islands and boats in blue water and inland areas with a mix of gray urban development, brown farmland, and green vegetation.
March 23, 2026

The karst landscape extends into the sea in the form of islands. For instance, Ko Po Da Nai and Ko Hong, visible in the wide satellite image above, feature steep limestone cliffs and caves, making them a popular destination for paddlers. Larger boats also cut through the water, their wakes appearing as white streaks.

On the mainland, the landscape beyond the sandy beaches includes varied terrain. Green forests cover the slopes of Khao Hang Nak, where hikers can take in views of the Andaman Sea and surrounding karst formations. At lower elevations, green mangroves line several rivers, including Khlong Chi Lat.

Human activity is most visible in the flatter plains, where urban development and agriculture have transformed the landscape. Krabi, the province’s capital, and nearby towns appear gray. To the northwest, patches of brown and green in geometric patterns indicate agricultural land, where oil palm and rubber trees are commonly grown alongside other crops such as pineapple.

NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. Photo by Shawn used under the Unsplash license. Story by Kathryn Hansen.

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CSDA Quality Assessment Report Evaluates Satellogic NewSat Data

2026-04-17 21:21

Issued March 9, 2026, the Commercial Satellite Data Acquisition Program Satellogic NewSat Radiometric & Geometric Quality Assessment Report documents the evaluation process of the NASA subject matter experts (SMEs) enlisted to analyze the quality of the constellation’s radiometric and geometric data products.
NASA/CSDA

A new quality assessment report from NASA’s Commercial Satellite Data Acquisition (CSDA) program approves the use of data from Satellogic’s NewSat constellation, which includes the Mark IV and Mark V sensor generations, for scientific use.

Issued March 9, 2026, the Commercial Satellite Data Acquisition Program Satellogic NewSat Radiometric & Geometric Quality Assessment Report documents the evaluation process of the NASA subject matter experts (SMEs) enlisted to analyze the quality of the constellation’s radiometric and geometric data products.

The SMEs analyzed 60 top-of-atmosphere reflectance images collected between 2021 and 2025, focusing on radiometric and geometric performance across multiple sites. Results showed generally strong radiometric accuracy, with the majority of spectral bands performing within 10% of Aqua MODIS reference values and signal-to-noise ratios meeting “Good” rating criteria for more than half of the bands. Geometric performance exceeded their specified sensor spatial response specifications, with some variability noted between sensor generations. (The Mark IV received an “Excellent” grade for sensor spatial response while the Mark V received a “Basic” grade.)

Since the release of the report, Satellogic has changed aspects of their data processing, in part to address findings and recommendations in the report. CSDA is engaged in a quality assessment of their revised products and will report on the results in the near future.

About the CSDA Program

NASA’s Earth Science Division (ESD) established the CSDA program to identify, evaluate, and acquire commercial remote sensing data that enhances NASA’s Earth science research and applications. CSDA provides structured on-ramping opportunities for emerging commercial satellite data vendors, enabling NASA to continuously integrate innovative data sources as the private sector evolves. By leveraging these partnerships, NASA’s ESD aims to accelerate scientific discovery and expand applications of Earth observation data for the NASA Earth science research and applications community and societal benefit.

Since its initial pilot, the CSDA Program has conducted three on-ramp activities, resulting in the addition of several vendors into sustainment. Since then, the program has streamlined its evaluation process by introducing high-quality, SME-led data assessments, accelerating reviews and strengthening NASA’s engagement with the rapidly growing commercial data ecosystem. The CSDA’s evaluation criteria include:

  • Accessibility of data
  • Completeness and accuracy of metadata
  • User support services provided by the commercial entity
  • Usefulness of submitted data for science and applications

This approach ensures NASA gains timely access to high-quality, mission-relevant commercial data, and provides valuable feedback to private-sector providers, fostering innovation, improved data products, and alignment of industry capabilities with NASA’s evolving scientific needs.

Resources

To read the CSDA’s Satellogic NewSat Radiometric & Geometric Quality Assessment Report, visit the CSDA website.

View the recent CSDA Vendor Focus Webinar on Satellogic on the CSDA program’s YouTube channel.

For more information about the CSDA program’s process for identifying commercial satellite vendors for on-ramp and evaluation, visit the CSDA website.

Webinar 4/29: NASA CSDA Program Vendor Focus- MDA Space

2026-04-17 20:33

An artistic rendering of the MDA Space CHORUS-C (right), RADARSAT-2 (centre), and CHORUS -X (left) synthetic aperture radar (SAR) Earth observation constellation in orbit above Earth. RADARSAT-2 was launched in 2007, with CHORUS - C/X satellites planned for Q4 2026 launch. The SAR imaging satellites fly in formation over the planet’s curved horizon at sunrise. Each satellite features large deployable solar arrays and a broad radar antenna structure used to capture high-resolution imagery of Earth’s surface day or night and through cloud cover. The scene emphasizes the three-satellite SAR mission architecture, showing the satellites positioned to deliver coordinated CHORUS-C and RADARSAT-2 wide-area monitoring, with following CHORUS-X high-resolution imaging.
Artistic rendering of the MDA Space CHORUS-C (right), RADARSAT-2 (centre), and CHORUS -X (left) synthetic aperture radar (SAR) Earth observation constellation in orbit above Earth.
NASA/CSDA

NASA’s Earth Science Division (ESD) established the Commercial Satellite Data Acquisition (CSDA) program to explore the potential of commercial satellite data in advancing the agency’s Earth science research and application objectives. The program aims to identify, assess, and acquire data from commercial providers, which may offer a cost-effective means of supplementing Earth observations collected by NASA, other U.S. Government agencies, and international collaborators.

During this NASA CSDA program vendor webinar, speakers will introduce MDA Space and the company’s satellite constellation; show participants how to discover, access, and work with these satellite C-band synthetic aperture radar (SAR) products; and speak to how these data products complement NASA Earth science data holdings for research and applications. Additional topics will focus on the services available to data users and getting assistance with the NASA CSDA program vendor MDA Space datasets, services, and tools.

For information and to Register

NASA Artemis II Human Research Data Methodology Challenge

2026-04-17 18:41

017A7337.NEF
art002e013365 (April 7, 2026) – The Artemis II crew – (clockwise from left) Mission Specialist Christina Koch, Mission Specialist Jeremy Hansen, Commander Reid Wiseman, and Pilot Victor Glover – pause for a group photo with their zero gravity indicator “Rise,” inside the Orion spacecraft on their way home. Following a swing around the far side of the Moon on April 6, 2026, the crew exited the lunar sphere of influence (the point at which the Moon’s gravity has a stronger pull on Orion than the Earth’s) on April 7, and are headed back to Earth for a splashdown in the Pacific Ocean on April 10.

NASA’s Human Research Program (HRP) uses research to develop methods to protect the health and performance of astronauts in space. In support of NASA’s goals for long-term missions on the surface of the Moon and human exploration of Mars, HRP is using ground research facilities, the International Space Station, and analog environments to monitor human health in deep space. 

NASA’s Artemis II mission was the first crewed mission to the vicinity of the Moon since Apollo 17 in December 1972. The mission carried four astronauts aboard the Orion spacecraft on a trajectory into deep space – farther than any humans have gone before – marking a pivotal milestone in the history of human exploration. For the first time in more than half a century, human beings experienced the full physiological and psychological conditions of space travel beyond low Earth orbit, including an environment with space radiation, the isolation and confinement of a new spacecraft, and the operational demands of a test mission profile. 

For HRP, Artemis II represents an irreplaceable research opportunity. The data collected from the four-person crew will expand an existing body of knowledge built primarily from missions in low Earth orbit, extending it into the deep space environment. It will provide direct measurements of how the human body responds to conditions that ground-based simulation cannot fully replicate. 

The unique dataset will also present a profound analytical challenge. Though the sample size is only four subjects, the data will span multiple physiological systems, data modalities, and time points. That combination is what the NASA Artemis II Human Research Data Methodology Challenge seeks to address.

Award: $25,000 in total prizes

Challenge Open Date: March 30, 2026

Submission Close Date: June 5, 2026

For more information, visit: https://hrpdatachallenge.org/

NASA, OPM Announce New NASA Force Website, Open Job Applications 

2026-04-17 17:04

Image showing NASA Force.gov website homepage
NASA and the U.S. Office of Personnel Management opened a new NASA Force website on Friday, April 17, 2026.
Credit: NASA

NASA and the U.S. Office of Personnel Management (OPM) launched the NASA Force website on Friday, opening applications for roles aimed at recruiting the nation’s top engineers and technologists to support America’s air and space program. 

NASA Force, a new hiring initiative developed in partnership with OPM, will recruit and place high-impact technical talent into mission-critical roles supporting NASA’s exploration, research, and advanced technology priorities, ensuring the agency has the cutting-edge expertise needed to maintain U.S. leadership in air and space. 

“NASA Force is bringing highly skilled early- to mid-career engineers, technologists and innovators to help us achieve our world-changing missions,” said NASA Administrator Jared Isaacman. “Our successful Artemis II mission has inspired the world and generated tremendous interest to join our workforce to be part of the Golden Age of innovation and exploration.” 

NASA Force is part of a broader US Tech Force  initiative established by OPM to recruit elite technical professionals into federal service at multiple agencies to modernize systems, accelerate innovation, and strengthen mission delivery. 

“NASA has always shown the world what American talent can achieve when it’s pointed at a bold mission,” said OPM Director Scott Kupor. “NASA Force is about making sure the agency has access to the next generation of innovation and strong partnerships with private sector talent to drive its very ambitious agenda.” 

The first job application under NASA Force is for aerospace engineer positions for a two-year term position, with the potential for additional term extensions. Additional openings are expected in the coming weeks and months. 

If interested in jobs in addition to NASA Force, visit: 

https://www.usajobs.gov

NASA is taking deliberate steps to retain and bolster its internal talent pipeline, strengthen technical core competencies and in-house capabilities, and foster an enduring culture of technical resilience.  NASA Force is one part of the agency’s workforce efforts aimed at achieving the President’s national space policy and maintaining unrivaled U.S. leadership in air and space exploration.   

To learn more about NASA Force and apply for jobs, visit:

https://www.nasaforce.gov

-end-

Camille Gallo / Jennifer Dooren  
Headquarters, Washington  
202-358-1600  
camille.m.gallo@nasa.gov / jennifer.m.dooren@nasa.gov 

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Last Updated
Apr 17, 2026
Editor
Jennifer M. Dooren

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