Air mass factor sensitivity to a priori profiles in GEMS formaldehyde retrieval during the ASIA-AQ campaign - Gitaek T. Lee; Rokjin J. Park; Hyeong-Ahn Kwon; Jaein I. Jeong; Seungun Lee; Eunjo S. Ha; Yoonbae Chung; Cheol-Hee Kim; Soontae Kim; Chul H. Song; Chang-Keun Song; Jung‐Hun Woo; et al. (Atmospheric Environment, 2026)