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WV-3040: Update VIIRS Day/Night Band Nighttime Lights version (#4982)
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* Update doi to version 2; update ENCC notice

* changed Landsat to 8 day revisit

* fixed a to an
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minniewong committed Feb 12, 2024
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The dynamically generated Reflectance (Bands 5-4-3, False Color) imagery layer is a false color composite that is used to gauge plant health and assess plant density. Plants reflect in near infrared and green light, while absorbing in red. Areas with better vegetation health appear red, and denser plant growth is a darker red. Cities, urban areas, and exposed ground appear grey or tan and water is blue or black.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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This Reflectance imagery layer can be customized to display any available Red-Green-Blue (R-G-B) band combination. Select the desired combination in via the Options panel. The layer is dynamically generated, therefore it may take longer to display.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Reflectance (Bands 5-4-3, Color Infrared) imagery layer is a false color composite that is used to gauge plant health and assess plant density. Plants reflect in near infrared and green light, while absorbing in red. Areas with better vegetation health appear red, and denser plant growth is a darker red. Cities, urban areas, and exposed ground appear grey or tan and water is blue or black.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Reflectance (Bands 7-6-4, Urban False Color) imagery layer is useful for visualizing urban areas more clearly. Urban areas are white, grey, or purple and vegetation appear in shades of green. Snow and ice are dark blue, and water is black or blue. Flooded areas are very dark blue, sometimes black. Wildfires and lava in calderas of volcanoes display in shades of yellow and red.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Reflectance (Bands 6-5-4, Vegetative Analysis False Color) imagery layer is useful for looking at vegetation. Vegetation are in shades of green. Burned areas appear bright red, while bare ground appear light red/pink. Water is black.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The Reflectance (Nadir BRDF Adjusted) imagery layer from Landsat 8 and 9/OLI is a true-color or natural color image because this combination of wavelengths is similar to what the human eye would see. It consists of natural-looking images of land surface, oceanic and atmospheric features. The Reflectance (Nadir BRDF Adjusted) imagery layer from Landsat 8 and 9/OLI provides 30m Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) and is derived from a combination of the joint NASA/USGS Landsat 8 and Landsat 9 Operational Land Imager (OLI) data products through the Harmonized Landsat and Sentinel-2 (HLS) project.

The Reflectance (Nadir BRDF Adjusted) imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance (Nadir BRDF Adjusted) imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

References: HLSL30 v002 [doi:10.5067/HLS/HLSL30.002](https://doi.org/10.5067/HLS/HLSL30.002)
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The dynamically generated Normalized Difference Moisture Index (NDMI) (B5-B6)/(B5+B6) imagery layer is an index to determine vegetation water content and monitor drought. It is calculated using near infrared and shortwave infrared (SWIR) wavelengths using the calculation NDMI = (B5-B6)/(B5+B6). On the rainbow color scale, darker blue colors represent high canopy without water stress, and greenish to yellow colors area areas approaching water stress.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Normalized Difference Snow Index (NDSI) (B3-B6)/(B3+B6) imagery layer is an index for quantifying snow cover. It can also be used to differentiate snow from cloud cover because while snow absorbs in the shortwave infrared light, it reflects the visible light, and cloud is generally reflective in both wavelengths. Snow cover is shown in dark blues. It is calculated using the calculation NDSI = (B3-B6)/(B3+B6).

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Normalized Difference Vegetation Index (NDVI) (B5-B4)/(B5+B4) imagery layer is an index for quantifying green vegetation. It reflects the state of vegetation health based on how vegetation reflects light at certain wavelengths. It is calculated using near infrared and red wavelengths using the calculation NDVI = (B5-B4)/(B5+B4). Depicted in dark green colors are areas with a lot of green leaf growth which indicates the presence of chlorophyll. Chlorophyll reflects more infrared light and less visible light. Areas with some green leaf growth are in light greens, and areas with little to no vegetation growth are even lighter greens.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Normalized Difference Water Index (NDWI) (B3-B5)/(B3+B5) imagery layer is useful for identifying water bodies and to monitor changes related to water content in water bodies. It is calculated using green and near infrared wavelengths using the caculation NDWI = (B3-B5)/(B3+B5). The index can overestimate water bodies as it is sensitive to built-up areas. Teal and blues indicate water bodies.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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The dynamically generated Reflectance (Bands 7-5-4, Shortwave Infrared) imagery layer is useful looking at how much water is present in plants and soils, as water absorbs in shortwave infrared wavelengths. It can be used to distinguish between cloud types like water clouds versus ice clouds, snow and ice, which appear white. Vegetation is in shades of green, soils and urban areas are in shades of brown, and water is black. Freshly burned areas appear red.

The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with a 16 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.
The Reflectance imagery layer from Landsat 8 and 9/OLI product (L30) is available through the HLS project from the Operational Land Imager (OLI) aboard the Landsat 8 and 9 satellites. The sensor resolution is 30 m, imagery resolution is 30 m, and the temporal resolution is daily with an 8 day revisit time. The imagery is available in Worldview/GIBS approximately 2 - 4 days after satellite overpass. There is a separate combined Sentinel 2A and Sentinel 2B imagery layer available.

This imagery layer is provided dynamically through the [NASA Interagency Implementation and Advanced Concepts Team (IMPACT)](https://earthdata.nasa.gov/esds/impact). As it is dynamically generated, it may take slightly longer to display than normal. The imagery is also only available at higher zoom levels.

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