NASA Seeks Industry Proposals for Next-Generation Lunar Rover

As Artemis II gets ready to launch in November 2024, NASA recently announced it is pursuing contract proposals from private companies for the development of a next-generation Lunar Terrain Vehicle (LTV) to be used for crewed missions starting with Artemis V, which is currently scheduled for 2029. NASA has set a due date for the proposals of July 10, 2023, at 1:30pm Central Time, with the announcement for rewarded contracts to occur in November 2023.

“We want to leverage industry’s knowledge and innovation, combined with NASA’s history of successfully operating rovers, to make the best possible surface rover for our astronaut crews and scientific researchers,” Lara Kearney, who is the manager of NASA’s Extravehicular Activity and Human Surface Mobility program at NASA’s Johnson Space Center, said in the statement.

NASA envisions the LTV as a hybrid rover capable of crewed and uncrewed operations, which will allow for continuous science exploration on the lunar surface. For crewed operations, the LTV will allow astronauts the ability to both explore the lunar surface and transport equipment that would otherwise be hindered by the limited moonwalk distances. For uncrewed operations, the LTV would have the ability to be remotely operated for both scientific and transportation needs, much like NASA’s Curiosity and Perseverance rovers currently exploring Mars.

The Artemis missions are slated to take place on the south pole of the Moon, meaning the LTV will endure extreme temperatures changes as it traverses areas of constant sunlight and constant darkness during any operations. Thus, the LTV will need to be equipped with more advanced systems than what are traditionally used on such rovers, including shielding from the extreme environments, semi-autonomous driving capabilities, and advanced power management and communication and navigation systems.

The requirements for the proposals are very in-depth, as NASA is requesting that all companies provide details ranging from LTV development to lunar surface operations, along with seating requirements of two crew members, scientific payloads such as a robotic arm or other device, and how the LTV will survive the extreme temperature changes at the south pole.

Why the lunar south pole?

The lunar south pole was chosen due to its permanently shadowed regions (PSRs), which, as the name implies, are areas, specifically craters, on the Moon that receive absolutely zero sunlight, and scientists believe this has been the case for the last few billion years. Since the Moon has no atmosphere, liquid water can’t exist on its surface, but these permanently darkened craters have been found to contain traces of water ice that have accumulated over the eons, which can be used on Artemis missions without the need for constant resupply from Earth.

Building off Apollo

The LTV is slated to be a significantly advanced version of the lunar roving vehicle (LRV) used on Apollo 15, 16, and 17. While that vehicle also carried two astronauts and allowed for a greater amount of scientific exploration than moonwalks could accomplish, the LRV could only be used for crewed operations, as remote operations for a rover was still decades away. Also, the LRV only experienced permanent sunlight, as all Apollo missions were conducted during the lunar day to allow for better surface operations. Therefore, the LRV didn’t experience extreme temperature changes as the LTV will endure at the lunar south pole for Artemis. For the three missions, the LRV traversed distances of 27.76 km (17.25 mi), 26.55 km (16.50 mi), and 35.89 km (22.30 mi), respectively, and the LTV will undoubtedly be designed to exceed these numbers for the Artemis missions.

The LTV will undoubtedly be sturdier, too, as Apollo 17 lost one of its LRV fender extensions during one outing, whose purpose was to prevent lunar dust from getting on the vehicle instruments. The damage was caused by Commander Gene Cernan unexpectedly catching his suit-strapped hammer on the fender and ripped it off. Without the fender, large amounts of lunar dust would be thrown up (which the astronauts called “rooster tails”), making it nearly impossible to use the LRV, as the lunar dust would gather heat from the Sun and potentially damage the instruments from the increased temperatures. In the end, the astronauts had to duct tape one of the laminated maps to create a makeshift fender to continue their rover operations.

As stated, the LTV isn’t scheduled to be used until Artemis V in 2029, so the company selected to build the LTV has a few years before it’s to be used on the Moon. In the meantime, Artemis II is scheduled for a 10-day orbital mission around the Moon in November 2024, followed by Artemis III in 2025 and Artemis IV in 2028.

How will the LTV improve operations for the Artemis missions in the coming years and decades? Only time will tell, and this is why we science!

As always, keep doing science & keep looking up!