Replace 4:36 a.m. EDT: Rocket Lab confirms a profitable deployment of NASA’s PREFIRE-1 cubesat.
Replace 3:52 a.m. EDT: Liftoff occurred at 3:41 a.m. EDT. Good first and second stage burns. Kick stage ignition
Replace 3:30 a.m. EDT: Countdown resumed for a brand new T-0 of three:41 a.m. EDT.
Replace 3:20 a.m. EDT: Countdown holding as a result of excessive floor winds.
Replace 10:44 p.m. EDT: Rocket Lab set the T-0 liftoff time for the mission.
NASA is making ready to launch a pair of local weather analysis missions inside weeks of one another. The 2 spacecraft share the title PREFIRE (Polar Radiant Power within the Far-Infrared Experiment) and are designed to review how a lot warmth is absorbed and emited from Earth’s polar areas, the area company stated.
The primary spacecraft, PREFIRE-1, is ready to liftoff on Could 25 onboard a Rocket Lab Electron rocket at 7:28 p.m. NZST (3:28 a.m. EDT, 0728 UTC). A selected date and time for the second mission has but to be introduced.
“We’re searching for new insights into how Earth’s ambiance and ice affect how a lot warmth the polar areas lose into area,” stated Karen St. Germain, director of NASA’s Earth Science Division, in a prelaunch teleconference. “That is new data and we’ve by no means had it earlier than. We’ll enhance our capability to mannequin what’s occurring within the poles, what’s occurring in local weather, and in the end, our capability to foretell the whole lot from climate to local weather.
“That is necessary to our technique of offering Earth science that’s actionable and might inform selections for communities world wide on reply and adapt to altering environmental situations.”
St. Germain additionally famous that by utilizing a pair of CubeSats, as a substitute of bigger spacecraft, NASA is exploring methods to create extra focused and agile missions sooner or later that won’t require as a lot lead time or expense.
Apart from the fee and logistics profit, Tristan L’Ecuyer, the PREFIRE principal investigator from the College of Wisconsin-Madison, stated inserting the dual craft in barely completely different orbits will probably be vital within the science knowledge they’re trying to collect.
“Having one CubeSat, we’ll have the ability to form of map out what the emissions seem like within the polar areas, however having a second CubeSat that flies over then, about six hours later, we’ll have the ability to perceive how adjustments, one thing like melting of the ice sheet or a cloud forming or a rise within the quantity of moisture within the ambiance, how that impacts the emission between the 2 completely different CubeSats,” L’Ecuyer stated.
“So we’ll be utilizing the 2 CubeSats to make measurements over the course of a number of hours aside, taking the distinction between these measurements and attempting to know how the processes which might be occurring within the Arctic are literally affecting the emission from the Arctic.”
Mary White, the PREFIRE undertaking supervisor, stated every spacecraft is roughly the dimensions of a giant shoebox and will probably be launched into asynchronous, near-polar orbits. To measure the adjustments talked about by L’Ecuyer, the spacecraft characteristic an instrument referred to as a “thermal infrared spectrometer,” which has been flown in bigger configurations by each plane and spacecraft.
“Though it’s a creating know-how, these thermopile detectors, we’re flying extra pixels on every detector than had been beforehand flown,” White defined. “We’ve an array of eight pixels within the spatial course by 64 pixels within the spectral course.”
About an hour and a half after launch, PREFIRE-1 will open up its photo voltaic panels to begin powering up its batteries. These on the bottom will attempt to set up communication with it by way of a floor station about 5 hours after launch.
White stated the spacecraft wants about 5 days for checkouts earlier than controllers are able to activate its foremost instrument. At that time, they’ll want one other roughly 5 days to checkout the instrument itself. Nonetheless, White stated they budgeted a month for this course of, on the off-chance that they want extra time.
“We would get into a bit of little bit of calibration within the second half of that month, however we’ll be bringing down knowledge from the instrument, type of preliminary knowledge, beginning most likely about 5 – 6 days into the mission,” White stated.
L’Ecuyer added that it’s going to additionally take a while to kind by way of the preliminary knowledge to make it make sense.
“However on the finish of a few months, we do hope to have the ability to have new observations of what the clouds seem like within the Arctic, what the floor traits seem like, whether or not the ice sheet is melting or refreezing after which additionally details about moisture within the Arctic,” L’Ecuyer stated. “[It’s] very laborious to measure from the bottom as a result of it’s additionally very inhospitable there, but in addition very troublesome to measure utilizing another current satellites.”
The 2 PREFIRE missions may also mark the forty eighth and forty ninth launches for Rocket Lab utilizing its Electron rocket. The satellites will deploy to a 525 km round Earth orbit at a 97.5° inclination.
Rocket Lab announced it acquired the mission by way of NASA’s VADR (Enterprise-class Acquisition of Devoted and Rideshare) contract in August 2023. In line with a NASA presentation, the mission is cost-capped at $32.78 million.
“We’re tremendously excited and clearly, to launch these two missions and likewise to make sure that the spacecraft arrive, each of them arrive safely in orbit,” stated Peter Beck, the CEO and founding father of Rocket Lab.
