From a82426062c4605787328965feab84dab173de5b2 Mon Sep 17 00:00:00 2001 From: OHehir-Aaron <64123289+OHehir-Aaron@users.noreply.github.com> Date: Thu, 4 Apr 2024 08:14:27 +1100 Subject: [PATCH] Update docs/guides/reference/ard-processing-extent.md Co-authored-by: Robbi Bishop-Taylor --- docs/guides/reference/ard-processing-extent.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/guides/reference/ard-processing-extent.md b/docs/guides/reference/ard-processing-extent.md index a3f6c9b6a..dd71258b5 100644 --- a/docs/guides/reference/ard-processing-extent.md +++ b/docs/guides/reference/ard-processing-extent.md @@ -70,7 +70,8 @@ dc.find_datasets(product="ga_ls8c_ard_3", limit=10, final_ancillaries="nonstanda ## Geometric quality assessment issues -[ARD](/guides/about/glossary/#ard) is a Surface Reflectance product which is derived from USGS or ESA level 1 products. The level 1 product is geometrically corrected such that the product is 'ortho-rectified' which results in enabling acquisitions from different dates to be spatially overlaid for assessment through time. The ARD product provides a comprehensive quality assurance of geometric correction known as GQA, which is found in the dataset and processing information metadata. +[ARD](/guides/about/glossary/#ard) is a Surface Reflectance product which is derived from USGS or ESA Level 1 products. The Level 1 product is geometrically corrected such that the product is 'ortho-rectified' which results in enabling acquisitions from different dates to be spatially overlaid for assessment through time. The ARD product provides a comprehensive quality assurance of geometric correction known as GQA, which is found in the dataset and processing information metadata. + This update features the addition of Landsat scenes and Sentinel 2 tiles over islands and reefs. Some of these islands, such as Christmas Island or islands south of Papua New Guinea, are at extreme high or low latitudes and are affected by persistent cloud. This presents challenges when correlating the reference image against source images to provide statistical geometric comparisons.