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Overview for NASA’s Northrop Grumman 20th Commercial Resupply Mission


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NASA's Northrop Grumman 20th commercial resupply mission will launch atop a SpaceX Falcon 9 rocket to deliver science and supplies to the International Space Station.
NASA’s Northrop Grumman 20th commercial resupply mission will launch atop a SpaceX Falcon 9 rocket to deliver science and supplies to the International Space Station.
NASA
NASA's Northrop Grumman 20th commercial resupply mission will launch from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.
NASA’s Northrop Grumman 20th commercial resupply mission will launch from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.
NASA

NASA, Northrop Grumman, and SpaceX are targeting 12:29 p.m. EST on Monday, Jan. 29, for the next launch to deliver science investigations, supplies, and equipment to the International Space Station. Filled with more than 7,800 pounds of supplies, the Cygnus cargo spacecraft, carried atop the SpaceX Falcon 9 rocket, will launch from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida. This launch is the 20th Northrop Grumman commercial resupply services mission to the orbital laboratory for the agency. The backup launch opportunity will be at 12:07 p.m. Tuesday, Jan. 30.

Live launch coverage will begin at 12:15 p.m. and air on NASA+, NASA Television, the NASA app, YouTube, and on the agency’s website, with prelaunch events starting Wednesday, Jan. 24. Learn how to stream NASA TV through a variety of platforms

Learn more at:  nasa.gov/northropgrumman

Northrop Grumman S.S. Patricia “Patty” Hilliard Robertson

Patricia Robertson was selected as a NASA astronaut in 1998 and scheduled to fly to the International Space Station in 2002, before her untimely death in 2001 from injuries sustained in a private plane crash.
Patricia Robertson was selected as a NASA astronaut in 1998 and scheduled to fly to the International Space Station in 2002, before her untimely death in 2001 from injuries sustained in a private plane crash.
NASA

Arrival & Departure

The Cygnus spacecraft will arrive at the orbiting laboratory at 3:35 a.m. Wednesday, Jan. 31, filled with supplies, hardware, and critical materials to directly support dozens of science and research investigations during Expeditions 70 and 71. NASA astronaut Jasmin Moghbeli will capture Cygnus using the station’s robotic arm, and NASA astronaut Loral O’Hara will act as backup.

After capture, the spacecraft will be installed on the Unity module’s Earth-facing port and will spend about six months connected to the orbiting laboratory before departing in May. Cygnus also provides the operational capability to reboost the station’s orbit.

After departure, the Kentucky Re-entry Probe Experiment-2 (KREPE-2), stowed inside Cygnus, will take measurements to demonstrate a thermal protection system for spacecraft and their contents during re-entry in Earth’s atmosphere, which can be difficult to replicate in ground simulations.

Live coverage of Cygnus’ arrival will begin at 2 a.m., Wednesday, Jan. 31.

NASA astronauts Jasmin Moghbeli and Loral O'Hara will be on duty during the Cygnus cargo craft's aproach and rendezvous. Moghbeli will be at the controls of the Canadarm2 ready to capture Cygnus as O’Hara monitors the vehicle’s arrival.
NASA astronauts Jasmin Moghbeli and Loral O’Hara will be on duty during the Cygnus cargo craft’s aproach and rendezvous. Moghbeli will be at the controls of the Canadarm2 robotic arm ready to capture Cygnus as O’Hara monitors the vehicle’s arrival.
NASA

Research Highlights

Scientific investigations traveling in the Cygnus spacecraft include tests of a 3D metal printer, semiconductor manufacturing, and thermal protection systems for re-entry to Earth’s atmosphere.

3D Printing in Space

Samples produced by the Metal 3D Printer prior to launch to the space station.
Samples produced by the Metal 3D Printer prior to launch to the space station.
ESA (European Space Agency)

An investigation from ESA (European Space Agency), Metal 3D Printer tests additive manufacturing or 3D printing of small metal parts in microgravity.

“This investigation provides us with an initial understanding of how such a printer behaves in space,” said Rob Postema of ESA. “A 3D printer can create many shapes, and we plan to print specimens, first to understand how printing in space may differ from printing on Earth and second to see what types of shapes we can print with this technology. In addition, this activity helps show how crew members can work safely and efficiently with printing metal parts in space.”

Results could improve understanding of the functionality, performance, and operations of metal 3D printing in space, as well as the quality, strength, and characteristics of the printed parts. Resupply presents a challenge for future long-duration human missions. Crew members could use 3D printing to create parts for maintenance of equipment on future long-duration spaceflight and on the Moon or Mars, reducing the need to pack spare parts or to predict every tool or object that might be needed, saving time and money at launch.

Advances in metal 3D printing technology also could benefit potential applications on Earth, including manufacturing engines for the automotive, aeronautical, and maritime industries and creating shelters after natural disasters.

Semiconductor Manufacturing in Microgravity

The gas supply modules and production module for Redwire's MSTIC investigation.
The gas supply modules and production module for Redwire’s MSTIC investigation.
Redwire

Manufacturing of Semiconductors and Thin-Film Integrated Coatings (MSTIC) examines how microgravity affects thin films that have a wide range of uses.

This technology could enable autonomous manufacturing to replace the many machines and processes currently used to make a wide range of semiconductors, potentially leading to the development of more efficient and higher-performing electrical devices.

Manufacturing semiconductor devices in microgravity also may improve their quality and reduce the materials, equipment, and labor required. On future long-duration missions, this technology could provide the capability to produce components and devices in space, reducing the need for resupply missions from Earth. The technology also has applications for devices that harvest energy and provide power on Earth.

Modeling Atmospheric Re-Entry

An artist’s rendering of one of the Kentucky Re-entry Probe Experiment-2 (KREPE-2) capsules during re-entry.
An artist’s rendering of one of the Kentucky Re-entry Probe Experiment-2 (KREPE-2) capsules during re-entry.
University of Kentucky

Scientists who conduct research on the space station often return their experiments to Earth for additional analysis and study. But the conditions that spacecraft experience during atmospheric reentry, including extreme heat, can have unintended effects on their contents. Thermal protection systems used to shield spacecraft and their contents are based on numerical models that often lack validation from actual flight, which can lead to significant overestimates in the size of system needed and take up valuable space and mass. Kentucky Re-entry Probe Experiment-2 (KREPE-2), part of an effort to improve thermal protection system technology, uses three capsules outfitted with different heat shield materials and a variety of sensors to obtain data on actual reentry conditions.

“Building on the success of KREPE-1, we have improved the sensors to gather more measurements and improved the communication system to transmit more data,” said Alexandre Martin, principal investigator at the University of Kentucky. “We have the opportunity to test several heat shields provided by NASA that have never been tested before, and another manufactured entirely at the University of Kentucky, also a first.”

The capsules can be outfitted for other atmospheric re-entry experiments, supporting improvements in heat shielding for applications on Earth, such as protecting people and structures from wildfires.

Remote Robotic Surgery

The surgical robot during testing on the ground before launch.
The surgical robot during testing on the ground before launch.
Virtual Incision Corporation

Robotic Surgery Tech Demo tests the performance of a small robot that can be remotely controlled from Earth to perform surgical procedures. Researchers plan to compare procedures in microgravity and on Earth to evaluate the effects of microgravity and time delays between space and ground.

The robot uses two “hands” to grasp and cut rubber bands, which simulate surgical tissue and provide tension that is used to determine where and how to cut, according to Shane Farritor, chief technology officer at Virtual Incision Corp., developer of the investigation with the University of Nebraska.

Longer space missions increase the likelihood that crew members may need surgical procedures, whether simple stiches or an emergency appendectomy. Results from this investigation could support development of robotic systems to perform these procedures. In addition, the availability of a surgeon in rural areas of the country declined nearly a third between 2001 and 2019. Miniaturization and the ability to remotely control the robot help make surgery available anywhere and anytime on Earth. 

NASA has sponsored research on miniature robots for more than 15 years. In 2006, remotely operated robots performed procedures in the underwater NASA’s Extreme Environment Mission Operations (NEEMO) 9 mission. In 2014, a miniature surgical robot performed simulated surgical tasks on the zero-g parabolic airplane.

Growing Cartilage Tissue in Space

The Janus Base Nano-matrix anchor cartilage cells (red) and facilitates the formation of the cartilage tissue matrix (green).
The Janus Base Nano-matrix anchor cartilage cells (red) and facilitates the formation of the cartilage tissue matrix (green).
University of Connecticut

Compartment Cartilage Tissue Construct demonstrates two technologies, Janus Base Nano-Matrix and Janus Base Nanopiece. Nano-Matrix is an injectable material that provides a scaffold for formation of cartilage in microgravity, which can serve as a model for studying cartilage diseases. Nanopiece delivers an RNA (ribonucleic acid)-based therapy to combat diseases that cause cartilage degeneration.

Cartilage has a limited ability to self-repair and osteoarthritis is a leading cause of disability in older patients on Earth. Microgravity can trigger cartilage degeneration that mimics the progression of aging-related osteoarthritis but happens more quickly, so research in microgravity could lead to faster development of effective therapies. Results from this investigation could advance cartilage regeneration as a treatment for joint damage and diseases on Earth and contribute to development of ways to maintain cartilage health on future missions to the Moon and Mars.

Cargo Highlights

SpaceX’s Falcon 9 rocket will launch the Northrop Grumman Cygnus spacecraft to the International Space Station

NASA's Northrop Grumman 20th commercial resupply mission will carry 7,805 pounds (3,540 kilograms) of cargo to the International Space Station.
NASA’s Northrop Grumman 20th commercial resupply mission will carry 7,805 pounds (3,540 kilograms) of cargo to the International Space Station.
NASA

Hardware  

  • Hydrogen Dome Assembly includes all  hydrogen and oxygen electrolysis replacement components within the International Space Station’s Oxygen Generation Assembly. These items are contained in a sub-ambient dome maintained at near vacuum pressure, designed to contain an explosion or fire in the electrolysis cell stack during operation. The dome provides a second barrier to protect against cabin air internal leakage and external leakage into the rack environment, and is pressurized with nitrogen gas for launch. This will launch as an  on-orbit spare.
  • Ion Exchange Bed — The ion exchange bed replacement unit consists of a pair of tubes in series containing ion exchange resins, which remove organic acids from the catalytic reactor effluent, and microbial check valve resin, which injects iodine into the water as a biocide agent. This will launch  as an on-orbit spare.
  • Catalytic Reactor — The catalytic reactor replacement unit oxidizes volatile organics from the wastewater so they can be removed by the gas separator and ion exchange bed replacement units as part of the station’s water recycling system. This will launch as an on-orbit spare.
  • Biocide Maintenance Canister — The Internal Thermal Control System Coolant Maintenance Assembly is designed to administer o-phthalaldehyde, a biocide used to purify the internal cooling loops in the Destiny laboratory, and the Harmony, Tranquility, Columbus, and Japanese Experiment Modules, to prevent the growth of microorganisms in the thermal control system. This unit will replace the current one installed in the laboratory.
  • Cylinder Flywheel — The ARED (Advanced Resistive Exercise Device) cylinder-flywheel assemblies provide the resistive loads for astronaut anaerobic exercise. The cylinder flywheels impart inertial forces to simulate Earth’s gravity during exercise.
  • International Space Station Roll Out Solar Array Modification Kit 7 – This upgrade kit consists of upper, mid, and lower struts (one each for left and right), a backbone, brackets, and support hardware for the new solar panels. This is the third in series of four modification kits needed to support the installation of the fourth set of upgraded solar arrays. The new arrays are designed to augment the station’s original solar arrays which have degraded over time. The replacement solar arrays are installed on top of existing arrays to provide a net increase in power with each array generating more than 20 kilowatts of power.
  • Urine Processor Assembly Pressure Control and Pump Assembly — The assembly evacuates the urine distillation assembly at startup and periodically purges non-condensable gases and water vapor and pumps them to the separator plumbing assembly. The purge pump housing and pressure control and pump assembly manifolds are liquid cooled to promote steam condensation, thereby reducing the volume of the purge gas. All these systems make up the system used to covert urine to drinking water.
  • Collection Packet and Adapter — Required for minimal, nominal water microbial sampling. In-flight water quality assessment is needed to assure that water of acceptable, defined quality will be available aboard the space station.

Watch and Engage

Live coverage of the launch from Cape Canaveral Space Force Station in Cape Canaveral, Florida, will air on NASA TV, NASA+ and the agency’s website. Live coverage will begin at 12:15 p.m.

Live coverage of Cygnus’ rendezvous and capture at the space station will begin at 3:35 a.m. Jan. 31. Read more about how to watch and engage.

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      Collecting Data Critical to Understanding Tropical Cyclones
      Tropical cyclone investigations require rapid quantitative observations to create 2D storm structure information. The four radiance data products in the TROPICS constellation [i.e., antenna temperature (L1a), brightness temperature (L1b), unified brightness temperature, and regularized scan pattern and limb-adjusted brightness temperature (L1c)] penetrate below the cloud top to gather data at greater frequency for a lower cost than current operational systems. The constellation data has been used to evaluate the development of the warm core and evolution of the ice water path within storms – two indicators of storm formation and subsequent changes in intensity.
      The upper-level warm core is key to tropical cyclone development and intensification. Precipitation may instigate rapid intensification through convective bursts that are characterized by expanding cold cloud tops, increasing ice scattering, lightning, and towers of intense rain and ice water that are indicative of strong updrafts. TROPICS frequencies provide a wealth of information on scattering by precipitation-sized ice particles in the eyewall and rainbands that will allow for researchers to track the macrostructure of convective bursts in tropical cyclones across the globe. In addition, TROPICS data helps clarify how variations in environmental humidity around tropical cyclones affect storm structure and intensification.
      Upper-level Warm Core
      Analysis of the upper-level warm core of a tropical cyclone reveals valuable information about the storm’s development. The tropical cyclone community is using data from TROPICS to understand the processes that lead to precipitating ice structure and the role it plays in intensification – see Figure 3. While the warm core has been studied for decades, TROPICS provides a new opportunity to get high-revisit rate estimates of the atmospheric vertical temperature profile. By pairing the temperature profile with the atmospheric vertical moisture profile, researchers can define the relative humidity in the lower-to-middle troposphere, which is critical to understanding the impact of dry environmental air on storm evolution and structure.
      Figure 3. TROPICS-3 imagery of Typhoon Kong-rey observed on October 29, 2024, a Category-5 storm that formed in the Pacific Ocean basin. Data gathered near 118 GHz was used to characterize temperature while data gathered near 205 GHz [right] revealed more about the inner structure of the storm. These data are used to define the warm core of the well-defined eye, located at 18.5° N. Figure Credit: U.S. Naval Research Laboratory Ice Water Path and Precipitation
      Another variable that helps to provide insight into the development of tropical cyclones is the ice water path, which details the total mass of ice present in a vertical column of the atmosphere and is therefore useful for characterizing the structure and intensity of these storms. Increasing ice water path can reflect strengthening convection within a storm and thereby be an indicator of likely intensification – see Figure 4. TROPICS is the first spaceborne sensor equipped with a 205-GHz channel that, along with the traditional 89, 118, and 183 GHz channels, is more sensitive to detecting precipitation-sized ice particles. In addition, the TROPICS Precipitation Retrieval and Profiling Scheme (PRPS) provides an estimate of precipitation. This scheme is based solely on the satellite radiances linked to precipitation rates, which can be used to generate products across time scales, from near-real-time to climatological scales.
      Figure 4. Global precipitation ice water path (PIWP) retrievals derived from TROPICS [top] compared to those derived using data from the GPM Dual-frequency Precipitation Radar (GPM DPR) [bottom] The strong agreement between the two datasets is further validated through case studies over hurricanes, where TROPICS observations correspond well with known storm characteristics. Figure Credit: Blackwell, W. J. et al. (2025) Collaborations and TROPICS Data in Action
      To evaluate and enhance the data gathered by TROPICS, the TROPICS application team enlisted the assistance of operational weather forecasters that formed the TROPICS Early Adopters program. In 2018, the program connected the application team to stakeholders interested in using TROPICS data for research, forecasting, and decision making. This collaboration improved approaches to diagnose and predict tropical cyclones. For example, the National Hurricane Center (NHC) found that the new TROPICS channel at 204.8 GHz offered the best approach to capture convective storm structure, followed by the more traditionally used 91-GHz channel. In addition, the U.S. Joint Typhoon Warning Center (JTWC) has been using TROPICS data to center-fix tropical cyclones and identify cloud formations. In particular, the JTWC team found that the 91-GHz channel was most useful for identifying cloud structure. Both NHC and JTWC found the TROPICS high revisit rate to be beneficial.
      In 2024, the TROPICS applications team developed the TROPICS Satellite Validation Module as part of the NOAA Hurricane Research Division’s annual Advancing the Prediction of Hurricanes Experiment (APHEX). The module coordinated data collection from NOAA’s Hurricane Hunter aircraft beneath TROPICS satellite overpasses to provide data to calibrate and validate TROPICS temperature, moisture, and precipitation measurements. Using this approach, the Hurricane Hunter team tracked Hurricane Ernesto over the central North Atlantic on August 15 and 16, 2024 and used the data to characterize the environment of Ernesto’s rain bands – see Figure 5.
      Figure 5. Brightness temperature (K) measured at 205 GHz from TROPICS-5 [right] and TROPICS-6 [left and center] from Hurricane Ernesto on August 15 and 16, 2024. The shaded circles denote 850–700 hPa relative humidity (%). Wind barbs are 850–700 hPa layer averaged winds (kt). Dropsonde data within 30 minutes of the TROPICS overpass times are plotted. Figure Credit: Blackwell, W. J. et al. (2025) In addition, the team used TROPICS observations in combination with GPM constellation precipitation estimates to characterize the lifecycle of Hurricane Franklin, which formed on August 19, 2023 and underwent a period of rapid intensification about eight days later. Intensification of the storm, in particular the period of rapid intensification (45 knot increase in maximum winds in 24 hours), occurred in association with a decrease in environmental vertical wind shear, a contraction of the radius of maximum precipitation, and an increase in the precipitation rate. Intensification ended with the formation of secondary rainbands and an outward shift in the radius of maximum precipitation.
      Conclusion
      TROPICS data offer the potential for improving forecasts from numerical weather prediction models and operational forecasts using its high spatial resolution and high revisit rates that enable enhanced characterization of tropical cyclones globally. To date, the TROPICS mission has produced a high-quality aggregate data record spanning 10 billion observations and 10 satellite years, using relatively low-cost microwave sounder constellations. All L1 (i.e., radiances) and L2 (i.e., geophysical products) data products and Algorithm Theoretical Basis Documents are available to the general public through the Goddard Earth Sciences Data and Information Services Center (GES DISC). The GES DISC data discussed in this article include L1 and L2 products for TROPICS-1, TROPICS-3, TROPICS-5, and TROPICS-6.
      TROPICS data has aided hurricane track forecasting for multiple storms as forecasters have used the data at multiple operational tropical cyclone forecast centers. Data gathered by TROPICS will soon be complemented by multiple commercial constellations that are coming online to improve the revisit rate and performance.
      William Blackwell 
      MIT Lincoln Laboratory
      wjb@ll.mit.edu
      Scott Braun
      NASA GSFC, TROPICS Project Scientist
      scott.a.braun@nasa.gov
      Stacy Kish
      Earth Observer Staff
      Earthspin.science@gmail.com
      Share








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      Last Updated Jun 09, 2025 Related Terms
      Earth Science View the full article
    • By NASA
      The SpaceX Dragon spacecraft carrying the Axiom Mission 3 crew is pictured approaching the International Space Station on Jan. 20, 2024.Credit: NASA NASA, Axiom Space, and SpaceX are targeting 8:22 a.m. EDT, Tuesday, June 10, for launch of the fourth private astronaut mission to the International Space Station, Axiom Mission 4.
      The mission will lift off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. The crew will travel to the orbiting laboratory on a new SpaceX Dragon spacecraft after launching on the company’s Falcon 9 rocket. The targeted docking time is approximately 12:30 p.m., Wednesday, June 11.
      NASA will stream live coverage of launch and arrival activities on NASA+. Learn how to watch NASA content through a variety of platforms, including social media.

      NASA’s mission responsibility is for integrated operations, which begins during the spacecraft’s approach to the space station, continues during the crew’s approximately two-week stay aboard the orbiting laboratory while conducting science, education, and commercial activities, and concludes once the spacecraft exits the station.

      Peggy Whitson, former NASA astronaut and director of human spaceflight at Axiom Space, will command the commercial mission, while ISRO (Indian Space Research Organisation) astronaut Shubhanshu Shukla will serve as pilot. The two mission specialists are ESA (European Space Agency) project astronaut Sławosz Uznański-Wiśniewski of Poland and Tibor Kapu of Hungary.
      As part of a collaboration between NASA and ISRO, Axiom Mission 4 delivers on a commitment highlighted by President Trump and Indian Prime Minister Narendra Modi to send the first ISRO astronaut to the station. The space agencies are participating in five joint science investigations and two in-orbit science, technology, engineering, and mathematics demonstrations. NASA and ISRO have a long-standing relationship built on a shared vision to advance scientific knowledge and expand space collaboration.
      The private mission also carries the first astronauts from Poland and Hungary to stay aboard the space station.
      NASA will join the mission prelaunch teleconference hosted by Axiom Space (no earlier than one hour after completion of the Launch Readiness Review) at 6 p.m., Monday, June 9, with the following participants:
      Dana Weigel, manager, International Space Station Program, NASA Allen Flynt, chief of mission services, Axiom Space William Gerstenmaier, vice president, Build and Flight Reliability, SpaceX Arlena Moses, launch weather officer, 45th Weather Squadron, U.S. Space Force To join the teleconference, media must register with Axiom Space by 12 p.m., Sunday, June 8, at:
      https://bit.ly/4krAQHK
      NASA’s mission coverage is as follows (all times Eastern and subject to change based on real-time operations):


      Tuesday, June 10
      6:15 a.m. – Axiom Space and SpaceX launch coverage begins.
      7:25 a.m. – NASA joins the launch coverage on NASA+.

      8:22 a.m. – Launch

      NASA will end coverage following orbital insertion, which is approximately 15 minutes after launch. As it is a commercial launch, NASA will not provide a clean launch feed on its channels.


      Wednesday, June 11
      10:30 a.m. – Arrival coverage begins on NASA+, Axiom Space, and SpaceX channels.


      12:30 p.m. – Targeted docking to the space-facing port of the station’s Harmony module.
      Arrival coverage will continue through hatch opening and welcome remarks.

      All times are estimates and could be adjusted based on real-time operations after launch. Follow the space station blog for the most up-to-date operations information.
      The International Space Station is a springboard for developing a low Earth economy. NASA’s goal is to achieve a strong economy off the Earth where the agency can purchase services as one of many customers to meet its science and research objectives in microgravity. NASA’s commercial strategy for low Earth orbit provides the government with reliable and safe services at a lower cost, enabling the agency to focus on Artemis missions to the Moon in preparation for Mars while also continuing to use low Earth orbit as a training and proving ground for those deep space missions.
      Learn more about NASA’s commercial space strategy at:
      https://www.nasa.gov/commercial-space
      -end-
      Claire O’Shea
      Headquarters, Washington
      202-358-1100
      claire.a.o’shea@nasa.gov
      Anna Schneider
      Johnson Space Center, Houston
      281-483-5111
      anna.c.schneider@nasa.gov
      Share
      Details
      Last Updated Jun 04, 2025 EditorJessica TaveauLocationNASA Headquarters Related Terms
      Private Astronaut Missions Commercial Space Humans in Space International Space Station (ISS) ISS Research Johnson Space Center Kennedy Space Center View the full article
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