Study 000223 ACRONYM: dei_qs_80_slot40 Takes two neighbouring slot positions, separated by 40". The aim is to put the left and right window edges repetitively at the same position on the Sun, so that both wings of high Doppler shift events at the window edge appear beyond the main line window. A small sample of clean slot windows have been chosen. Windows are wide, not less than 56 pixels, except for CaXVII (set to 8). TARGET: Quiet Region of Sun EXPOSURE TIME: 30 s SLIT: 40" FOV: 80"x512" SPECTRAL WIND: 10 DATA COMP.: DCPM Lossless POINTING: Filaments, Prominences, Quiet Sun. To be run with SUMER WARNING: None