Merge pull request #280 from GeoscienceAustralia/feature/hotspots-out…

…age-jul24

Tech alert - Outage of Hotspots S-NPP VIIRS data

docs/tech-alerts-changelog/_tech_alerts_changelog.md

@@ -10,6 +10,7 @@
 
 * Misclassification issue with Sentinel-2 's2cloudless' cloud masking from 2022. See below.
 * Terra-derived DEA Hotspots are unavailable. See below.
+* Outage of Hotspots S-NPP VIIRS data. See below.
 :::
 
 ## Upcoming change: Shift in origin point of DEA Summary Product Grid
@@ -24,6 +25,10 @@ All new versions of our 'summary derivative products' will be affected by this c
 
 Learn more about the [DEA Summary Product Grid](/guides/reference/collection_3_summary_grid/).
 
+## 2024-07-25: Outage of Hotspots S-NPP VIIRS data
+
+This issue concerns [DEA Hotspots](https://knowledge.dea.ga.gov.au/data/product/dea-hotspots/). The Suomi-NPP satellite has experienced a data outage that has resulted in data unavailability until further notice. Therefore, Suomi-NPP VIIRS Hotspots cannot be published until this issue is resolved. Other DEA Hotspots sub-products are unaffected by this outage.
+
 ## 2024-07-01: External data products now featured on the Knowledge Hub
 
 External data products are produced by external providers such as a different program of Geoscience Australia or a different organisation entirely. These external data products may assist with the analysis of DEA data. DEA even provides services relating to some of these external products. Therefore, we have begun to include some external products on our Knowledge Hub so that you can easily find and access this data. So far, we have added three external data products to the Knowledge Hub. But watch this space, as there are more to come!