2021-05-20T10:24:45.000Z http://sot.lmsal.com Ted Tarbell LMSAL http://lmsal.com 3251 Hanover Rd, O/ADBS, B/252, Palo Alto, CA, 94304 +1-650-424-2400 tarbell@lmsal.com Hinode SOTSP Tezuka Brooks Tiwari (RCO) 130 130 null EUNIS Target for Launch Window (17--18 UT) AR AR Active Region 7 -864 289 0 0 2021-05-18T18:41:30.000Z 2021-05-18T19:47:00.000Z -864 289 Coordinated Observations Between the EUNIS-2018 Sounding Rocket and EIS Fast map, 230"x164", Q65, 1-side CCD Main Objective: We propose to coordinate the EUNIS sounding rocket with EIS, IRIS, EOVSA, and IBIS during the flight scheduled for 6 November 2018. Scientific Justification: EUNIS contains two co-aligned multilayer telescope/spectrographs that cover spectral ranges 9.0-11.0 nm and 52.5-63.5 nm with 2-arcsec slits that extend over 11 arcmin (nearly a full solar radius). Our primary science objectives are to investigate pervasive, faint emission in lines of Fe XVIII and Fe XIX that would provide compelling evidence for the nanoflare model of solar coronal heating, and explore the relatively uncharted 9.0-11.0 nm wavelength range. This will be achieved with a sequence of fast EUNIS rasters in which the slit pointings will scan back and forth continuously within a maximum displacement of about 2 arcmin from the initial pointing. An additional EUNIS objective is to cross calibrate with EIS. This will be achieved indirectly for both EIS wavebands (17.0-20.5 nm and 25.0-29.0 nm) by comparing density- and temperature-insensitive line intensity ratios with theoretical values derived from CHIANTI. The key to the "indirect" cross calibration is that each line pair will include one member from EIS and one member from EUNIS.