WFIRST will have two instruments, the Wide Field … The wide-field view of WFIRST … WFIRST will have the same resolution as Hubble but 100 times the field of view. This is where, when a small planet passes in front of a … Topics also include target viewing (including Continuous Viewing Zone, South Atlantic Anomaly and HST position uncertainty), Sun and earth limb pointing constraints, and telescope roll and orientation constraints.

The telescope has a primary mirror that is 2.4 meters in diameter (7.9 feet), and is the same size as the Hubble Space Telescope's primary mirror. “It is because of Nancy Grace Roman’s leadership and vision that NASA became a pioneer in astrophysics and launched Hubble, the world’s most powerful and productive space telescope,” says NASA administrator Jim Bridenstine.

The viewing area of Hubble (top left) as compared to the area that WFIRST will be able to view, at... [+] the same depth, in the same amount of time.

The integral field unit (IFU) considered as an augmentation option in DRM1 has been incorporated into the baseline design of WFIRST- The Advantages of Speed. Webb will have a 6.5 meter diameter primary mirror, which would give it a significantly larger collecting area than the mirrors available on the current generation of space telescopes. The Nancy Grace Roman Space Telescope (truncated as Roman or the Roman Space Telescope, and formerly the Wide Field Infrared Survey Telescope or WFIRST) is a NASA infrared space observatory currently under development. WFIRST, the Wide Field InfraRed Survey Telescope, is a NASA observatory designed to settle essential questions in the areas of dark energy, exoplanets, and infrared astrophysics. Roman was recommended in 2010 by United States National Research Council Decadal Survey committee as the top priority for the next decade of astronomy. WFIRST is designed to collect the big data needed to tackle essential questions across a wide range of topics, including dark energy, exoplanets, and general astrophysics spanning from our solar system to the most distant galaxies in the observable universe. Posted: May 18, 2020 2:10 pm ET | Last Updated: May 18, 2020 2:10 pm ET | NASA will have a special edition of Science Live on NASA TV in May 20,2020 at 11:00 am ET with “exciting news” about the Wide-Field Infrared Survey Telescope (WFIRST). A concise overview of the HST orbital visibility characteristics and operating constraints can be found in the Orbital Constraints section of the HST Primer. However the image quality on any telescope degrades the further you are away from the optical axis. The episode will air live on NASA’s website, NASA YouTube, NASA Facebook and Twitter/Periscope. Hubble and WFIRST are both the same diameter 2.4m so they both have the same theoretical resolution. WFIRST, however, will use both the transit method and a different method called microlensing. In fact, WFIRST’s field of view is 100 times larger than Hubble’s. ACS Abell 370 is a massive galaxy cluster in the middle of a field of almost 8,000 galaxies. But its field of view is 100 times larger than either of its predecessors. "A picture from Hubble is a nice poster on the wall, while a WFIRST image will cover the entire wall of your house," said David Spergel, co-chair of the WFIRST science working group and the Charles A. With a faster focal length than Hubble’s (f/7.8 vs. Hubble’s f/24), the mission will have a field of view 100 times larger. The observatory will host the 288-megapixel Wide-Field Instrument (WFI).

In WFIRST there is a 3rd mirror that corrects for these inherent distortions for a much wider field of view. A single WFIRST image will hold the equivalent detail of 100 pictures from Hubble. The Advanced Camera for Surveys (ACS) is a third-generation Hubble Space Telescope (HST) instrument installed in March 2002 during HST Servicing Mission 3B. With a faster focal length than Hubble’s (f/7.8 vs. Hubble’s f/24), the mission will have a field of view 100 times larger. “I can think of no better name for WFIRST, which will be the successor to NASA’s Hubble and Webb telescopes.”

• WFIRST-AFTA uses a 2.4 m telescope from another government agency • WFIRST-ATFA is “a wide-field Hubble”, with a 0.28 deg2 field of view (larger than the full Moon, 100xJWST), infrared images almost as sharp as Hubble’s visible images, and both IFU and grism spectroscopy. 2.0μm wavelength cutoff (vs. 2.4μm) because of a higher telescope operating temperature – but for most investigations WFIRST-2.4 is a substantially more pow-erful facility than DRM1. WFIRST sports a single 2.4-meter-diameter mirror that's comparable in size to HST's primary but smaller than Webb's, so its vision is equivalent to Hubble's and less sharp than Webb's. Astronomers hope to use the Roman Space Telescope to probe the nature of dark energy by hunting for Type 1a supernovae and gravitationally lensed galaxies.