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SUMMARY:P16 - Dark Sky Tanay: Assessing the Night Sky Brightness of Tanay\
 , Rizal using VIIRS Nighttime Lights and Vertical Plane Imaging
DTSTART;VALUE=DATE-TIME:20261123T033000Z
DTEND;VALUE=DATE-TIME:20261123T040000Z
DTSTAMP;VALUE=DATE-TIME:20261112T145952Z
UID:indico-contribution-917@indico.narit.or.th
DESCRIPTION:Speakers: Benedick James Baclig ()\nTanay\, Rizal has become o
 ne of the most frequented destinations for camping\, stargazing\, and outd
 oor recreation in the Philippines due to its relatively dark skies\, eleva
 ted terrain\, and accessibility from Metro Manila. However\, increasing to
 urism development\, expanding infrastructure\, and the growing use of arti
 ficial outdoor lighting pose potential threats to the quality of its night
 time environment. As light pollution continues to increase globally\, the 
 preservation of naturally dark areas has become an important concern for a
 stronomy\, ecology\, sustainable tourism\, and environmental conservation.
  This study aims to establish a baseline assessment of the light pollution
  conditions and dark-sky potential of Tanay through the integration of sat
 ellite-based and ground-oriented imaging techniques.\n\nThe study utilizes
  VIIRS Suomi-NPP Cloud-Free Moonlight-adjusted Nighttime Lights data to qu
 antify artificial light emissions and evaluate spatial patterns of nightti
 me radiance in and around candidate observation sites. Temporal and spatia
 l analyses are conducted using zonal statistics\, confidence intervals\, a
 nd radiance trend assessments to identify areas experiencing increasing le
 vels of artificial illumination. To complement the satellite analysis\, ve
 rtical plane imaging employing fisheye-lens photography is used to charact
 erize the distribution\, intensity\, and color temperature of local lighti
 ng sources and to identify potential contributors to skyglow and light tre
 spass. The combined methodology follows established approaches in astronom
 ical site assessment and light pollution research\, allowing both large-sc
 ale and localized evaluation of nighttime lighting conditions.\n\nThe rese
 arch provides a preliminary characterization of the night-sky environment 
 of Tanay and identifies areas where increasing artificial lighting may aff
 ect the visibility of celestial objects and the quality of outdoor nightti
 me experiences. By combining remote sensing with site-level imaging\, the 
 study offers a framework for monitoring light pollution in emerging astrot
 ourism and ecotourism destinations. The findings are expected to support f
 uture efforts in responsible lighting management\, dark-sky conservation\,
  astronomy education\, and sustainable tourism planning. Furthermore\, the
  study highlights the importance of proactive monitoring and mitigation me
 asures to preserve the remaining dark skies of Tanay as a valuable scienti
 fic\, environmental\, and cultural resource for future generations.\n\n***
 Keywords:** Light Pollution\, Dark-Sky Conservation\, Tanay Rizal\, VIIRS 
 Nighttime Lights\, Vertical Plane Imaging\, Astrotourism\, Night Sky Brigh
 tness\, Sustainable Tourism\, Astronomy Education.*\n\nhttps://indico.nari
 t.or.th/event/238/contributions/917/
LOCATION:Dusit Thani Mactan Cebu Resort\, Mactan\, Cebu
URL:https://indico.narit.or.th/event/238/contributions/917/
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