NASA Earth Observatory - In spring 2024, an international field campaign—ASIA-AQ (Airborne and Satellite Investigation of Asian Air Quality)—headed to Thailand to take a close look at the haze. During the last two weeks of March 2024, NASA’s DC-8 and Gulfstream III aircraft flew several flights over Chiang Mai, Bangkok, and rural areas surrounding the cities to sample air quality with several sensors. At the same time, satellites observed the haze from above.