Earthobservatory.nasa.gov - SEO Checker

Overview of the SEO Check
Meta information
86% 
Page quality
67% 
Page structure
29% 
Link structure
25% 
Server
0% 
External factors
100% 
SEO Score
Response time
0.68 s
File size
82.70 kB
Words
1303
Media files
61
Number of links
197 internal / 8 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NASA Earth Observatory - Home
The length of the page title is perfect. (295 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The Earth Observatory shares images and stories about the environment, Earth systems, and climate that emerge from NASA research, satellite missions, and models.
The meta description is too long: 1030 pixels from max. 1000 pixels. Optimize description
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1
orgcode610
rnoRobert.C.Levy.1
content-ownerPaul.D.Przyborski.1
webmasterPaul.D.Przyborski.1
descriptionThe Earth Observatory shares images and stories about the environment, Earth systems, and climate that emerge from NASA research, satellite missions, and models.
DC.Identifierhttps://earthobservatory.nasa.gov/
DC.TitleNASA Earth Observatory - Home
DC.DescriptionThe Earth Observatory shares images and stories about the environment, Earth systems, and climate that emerge from NASA research, satellite missions, and models.
DC.Date2025-05-09
DC.Date.X-MetadataLastModified1969-12-31
DC.PublisherNASA Earth Observatory
DC.Publisher.Addresshttps://earthobservatory.nasa.gov/contact/
DC.Languageen
DC.TypeText.Article
DC.Formattext/html
DC.subjectThe Earth Observatory shares images and stories about the environment, Earth systems, and climate that emerge from NASA research, satellite missions, and models.
csrf-tokenbNy8KXIsx7RRtnb2TS4JCUpx3vsdeh0mLO9UeWaE
langen
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
There are 2 text duplicates on this page:
  • Duplicate: Warmer-than-average temperatures are showing up locally and globally, ...
This page contains 1303 words. That's ok.
31% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
26 paragraphs were found on this page.
No placeholders texts or images were found.
The average number of words per sentence of 16.97 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 15 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 26 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/img/topics/topic-snowIce.svgSnow & Ice
/img/logo-meatball2.pngNASA
/img/logo-meatball1.pngNASA
/img/logoWhite.pngEarth Observatory
/img/logo.pngEarth Observatory
/img/icon-search.svgSearch Icon
/img/icon-search.svgSearch Icon
/img/logo-meatball1.pngNASA
/img/logo.pngEarth Observatory
.../154309/stonetown_oli_20240624_front.jpgDigging Into the History of Stone Town
/img/logo-mark.svgEarth Observatory
.../redphytoplanktonmap_amo_20090617_th.jpgMapping the Tiny Plankton That Feed Giant Right Whales
...0/154296/canadafires_amo_20250513_th.jpgFires Erupt in North American Forests
/img/topics/topic-atmosphere.svgAtmosphere
/img/topics/topic-land.svgLand
/img/topics/topic-snowIce.svgSnow & Ice
/img/topics/topic-water.svgWater
/img/topics/topic-human.svgHuman
/img/topics/topic-naturalEvent.svgNatural Event
/img/topics/topic-life.svgLife
/img/topics/topic-climate.svgClimate Indicators
/img/placeholder-worldMap.pngWorld Map
/img/logo-mark.svgSubscribe to the Earth Observatory
/img/eokids/eokidslogo.pngEOKids
.../kuril_cloudvortices_amo_20250414_th.jpgVortex Variety Hour
...54287/canadafireszm_oli2_20250510_th.jpgA Smoky Start to Saskatchewan’s Fire Season
...cords/154000/154280/iss072e125247_th.jpgLights of Southeast Asia
...00/154273/utarchesnp_oli_20250409_th.jpgThe Arches That Salt Built
/img/eokids/eokidslogo.pngEOKids
...54270/hawaiikilauea_oli2_20250502_th.jpgOn-Again, Off-Again at Kilauea
.../kazakhstanflooding_oli2_20250424_th.jpgSpring Flooding in Kazakhstan
...262/sgeorgia_iceberg_amo_20250503_th.jpgAntarctic Iceberg Loses Its Edge
/img/logo-mark.svgSubscribe to the Earth Observatory
/img/globalmaps/MODAL2_M_CLD_FR.jpgCloud Fraction
...00/154257/newzealand_tmo_20250505_th.jpgLate-Autumn Storm Lashes New Zealand
...4243/bc_herringspawn_oli_20250427_th.jpgSpawning Spectacle
/img/globalmaps/MOD_LSTAD_M.jpgLand Surface Temperature Anomaly
...rds/154000/154246/ISS072-E-423041_th.jpgSalty Emi Koussi
/img/globalmaps/MOD_LSTD_M.jpgLand Surface Temperature
...reteasers/149000/149094/woc_clean_th.jpgWorld of Change
...249/midwestflooding_oli2_20250413_th.jpgArkansas Farmers Face Lingering Floodwaters
/img/globalmaps/MODAL2_M_AER_OD.jpgAerosol Optical Depth
...ploads/sites/5/2025/04/april_puzzler.jpgApril Puzzler
...53154/hurricaneberyl_vir_20230630_th.jpg2024 North Atlantic Hurricane Season
...82000/82416/warsaw_oli_2013251_thumb.jpgHow to Interpret a Satellite Image: Five Tips and Strategies
.../featureteasers/0/406/blue_marble_tn.jpgBlue Marble Next Generation
/img/globalmaps/MOD14A1_M_FIRE.jpgFire
/img/globalmaps/MY1DMM_CHLORA.jpgChlorophyll
...153012/bhadlasolarpark_oli_202226_th.jpgRenewable and Alternative Energy
...s/153000/153013/india_vir_2022305_th.jpgAir Quality
.../153015/globalheat_geos5_20240625_th.jpgTemperature Extremes 2024
...sers/79000/79699/blackmarble_2016_th.jpgEarth at Night
.../171/Biomes_Map_05_logo_padded_white.jpgMission: Biomes
...53000/153014/bcfires_amo_20240511_th.jpg2024 Fires in the Northern Hemisphere
...51000/151710/swheat_geos5_2023237_th.jpgTemperature Extremes 2023
/img/logo-mark.svgEarth Observatory
/img/social-facebook.svgFacebook
/img/social-twitter.svgTwitter
/img/social-instagram.svgInstagram
/img/social-subscribe.svgSubscribe
/img/social-rss.svgRSS

Page structure

H1 heading
(Critically important)
Digging Into the History of Stone Town
Too many H1 headings
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 37 headings on the page. The amount of headings should be in a more proper relation to the amount of text.
Some headings do not have any content.

Heading structure

Heading levelContent
H1 Digging Into the History of Stone Town
H1 The World
H1 Subscribe
H1 Empty heading
H1 Subscribe Duplicate text
H3 Mapping the Tiny Plankton That Feed Giant Right Whales
H3 Mapping the Tiny Plankton That Feed Giant Right Whales Duplicate text
H3 Fires Erupt in North American Forests
H3 Fires Erupt in North American Forests Duplicate text
H4 Vortex Variety Hour
H4 A Smoky Start to Saskatchewan’s Fire Season
H4 Lights of Southeast Asia
H4 The Arches That Salt Built
H4 On-Again, Off-Again at Kilauea
H4 Spring Flooding in Kazakhstan
H4 Antarctic Iceberg Loses Its Edge
H4 Cloud Fraction
H4 Late-Autumn Storm Lashes New Zealand
H4 Spawning Spectacle
H4 Land Surface Temperature Anomaly
H4 Salty Emi Koussi
H4 Land Surface Temperature
H4 World of Change
H4 Arkansas Farmers Face Lingering Floodwaters
H4 Aerosol Optical Depth
H4 April Puzzler
H4 2024 North Atlantic Hurricane Season
H4 How to Interpret a Satellite Image: Five Tips and Strategies
H4 Blue Marble Next Generation
H4 Fire
H4 Chlorophyll
H4 Renewable and Alternative Energy
H4 Air Quality
H4 Temperature Extremes 2024
H4 Earth at Night
H4 Mission: Biomes
H4 2024 Fires in the Northern Hemisphere
H4 Temperature Extremes 2023
H5 Empty heading
H5 Empty heading
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 8 external links on this page.
LinkAttributesAnchor text
/topic/atmosphereAtmosphere
/topic/heatHeat
/topic/human-presenceHuman Presence
/topic/landLand
/topic/lifeLife
/topic/natural-eventAll
/topic/droughtDrought
/topic/dust-and-hazeDust and Haze
/topic/earthquakesEarthquakes
/topic/firesFires
/topic/floodsFloods
/topic/landslidesLandslides
/topic/man-madeMan-made
/topic/sea-and-lake-iceSea and Lake Ice
/topic/severe-stormsSevere Storms
/topic/temperature-extremesTemperature Extremes
/topic/unique-imageryUnique Imagery
/topic/volcanoesVolcanoes
/topic/water-colorWater Color
/topic/remote-sensingRemote Sensing
/topic/snow-and-iceSnow & Ice
IMG-ALT Snow & Ice
/topic/waterWater
/collection/1619/abcs-from-spaceABCs from Space
/collection/1722/air-qualityAir Quality
/collection/1676/amazon-defore...Amazon Deforestation
/collection/1461/astronaut-pho...Astronaut Photography
/collection/1717/backgroundersBackgrounders
/collection/1484/blue-marbleBlue Marble
/collection/1595/earth-at-nightEarth at Night
/collection/1658/earth-from-afarEarth from Afar
/collection/1692/fall-colorsFall Colors
/collection/1714/food-and-agri...Food and Agriculture
/collection/1687/international...International Parks and UNESCO Sites
/collection/1702/renewable-and...Renewable and Alternative Energy
/collection/1654/science-in-ac...Science in Action
/collection/1684/sea-level-riseSea Level Rise
/collection/1596/us-national-p...U.S. National Parks
/world-of-changeWorld of Change
https://www.nasa.gov/External Subdomain IMG-ALT NASA
/IMG-ALT Earth Observatory
/imagesImages
/global-mapsGlobal Maps
/featuresArticles
/blogs/Blogs
/map/EO Explorer
/images/154309/digging-into-th...IMG-ALT Digging Into the History of Stone Town
/images/154309/digging-into-th...Text duplicate Digging Into the History of Stone Town
/topic/human-presenceText duplicate Human Presence
/images/154283/mapping-the-tin...IMG-ALT Mapping the Tiny Plankton That Feed Giant Right Whales
/images/154283/mapping-the-tin...Text duplicate Mapping the Tiny Plankton That Feed Giant Right Whales
/topic/image-of-the-dayImage of the Day
/topic/lifeText duplicate Life
/topic/waterText duplicate Water
/topic/remote-sensingText duplicate Remote Sensing
/images/154296/fires-erupt-in-...IMG-ALT Fires Erupt in North American Forests
/images/154296/fires-erupt-in-...Text duplicate Fires Erupt in North American Forests
/topic/image-of-the-dayText duplicate Image of the Day
/topic/atmosphereText duplicate Atmosphere
/topic/landText duplicate Land
/topic/firesText duplicate Fires
/subscribe/Subscribe to our newsletters
IMG-ALT Subscribe to the Earth Observatory
/blogs//eokids/IMG-ALT EOKids
/images/154293/vortex-variety-...IMG-ALT Vortex Variety Hour
/images/154293/vortex-variety-...Text duplicate Vortex Variety Hour
/topic/image-of-the-dayText duplicate Image of the Day
/topic/atmosphereText duplicate Atmosphere
/images/154287/a-smoky-start-t...IMG-ALT A Smoky Start to Saskatchewan’s Fire Season
/images/154287/a-smoky-start-t...Text duplicate A Smoky Start to Saskatchewan’s Fire Season
/topic/image-of-the-dayText duplicate Image of the Day
/topic/firesText duplicate Fires
/topic/remote-sensingText duplicate Remote Sensing
/images/154280/lights-of-south...IMG-ALT Lights of Southeast Asia
/images/154280/lights-of-south...Text duplicate Lights of Southeast Asia
/topic/image-of-the-dayText duplicate Image of the Day
/topic/atmosphereText duplicate Atmosphere
/topic/human-presenceText duplicate Human Presence
/images/154273/the-arches-that...IMG-ALT The Arches That Salt Built
/images/154273/the-arches-that...Text duplicate The Arches That Salt Built
/topic/image-of-the-dayText duplicate Image of the Day
/topic/landText duplicate Land
/blogs/eokids/Text duplicate IMG-ALT EOKids
/images/154270/on-again-off-ag...IMG-ALT On-Again, Off-Again at Kilauea
/images/154270/on-again-off-ag...Text duplicate On-Again, Off-Again at Kilauea
/topic/image-of-the-dayText duplicate Image of the Day
/topic/heatText duplicate Heat
/topic/landText duplicate Land
/topic/volcanoesText duplicate Volcanoes
/images/154265/spring-flooding...IMG-ALT Spring Flooding in Kazakhstan
/images/154265/spring-flooding...Text duplicate Spring Flooding in Kazakhstan
/topic/image-of-the-dayText duplicate Image of the Day
/topic/floodsText duplicate Floods
/topic/remote-sensingText duplicate Remote Sensing
/images/154262/antarctic-icebe...IMG-ALT Antarctic Iceberg Loses Its Edge
/images/154262/antarctic-icebe...Text duplicate Antarctic Iceberg Loses Its Edge
/topic/image-of-the-dayText duplicate Image of the Day
/topic/landText duplicate Land
/topic/snow-and-iceSnow and Ice
/subscribe/Text duplicate Subscribe to our newsletters
IMG-ALT Subscribe to the Earth Observatory
/global-maps/MODAL2_M_CLD_FRIMG-ALT Cloud Fraction
/global-maps/MODAL2_M_CLD_FRText duplicate Cloud Fraction
/topic/atmosphereText duplicate Atmosphere
/images/154257/late-autumn-sto...IMG-ALT Late-Autumn Storm Lashes New Zealand
/images/154257/late-autumn-sto...Text duplicate Late-Autumn Storm Lashes New Zealand
/topic/image-of-the-dayText duplicate Image of the Day
/topic/severe-stormsText duplicate Severe Storms
/topic/remote-sensingText duplicate Remote Sensing
/topic/temperature-extremesText duplicate Temperature Extremes
/images/154243/spawning-spectacleIMG-ALT Spawning Spectacle
/images/154243/spawning-spectacleText duplicate Spawning Spectacle
/topic/image-of-the-dayText duplicate Image of the Day
/topic/waterText duplicate Water
/global-maps/MOD_LSTAD_MIMG-ALT Land Surface Temperature Anomaly
/global-maps/MOD_LSTAD_MText duplicate Land Surface Temperature Anomaly
/topic/heatText duplicate Heat
/topic/landText duplicate Land
/images/154246/salty-emi-koussiIMG-ALT Salty Emi Koussi
/images/154246/salty-emi-koussiText duplicate Salty Emi Koussi
/topic/image-of-the-dayText duplicate Image of the Day
/topic/landText duplicate Land
/global-maps/MOD_LSTD_MIMG-ALT Land Surface Temperature
/global-maps/MOD_LSTD_MText duplicate Land Surface Temperature
/topic/heatText duplicate Heat
/topic/landText duplicate Land
/world-of-changeText duplicate IMG-ALT World of Change
/world-of-changeText duplicate World of Change
/topic/atmosphereText duplicate Atmosphere
/topic/heatText duplicate Heat
/topic/landText duplicate Land
/topic/lifeText duplicate Life
/topic/human-presenceText duplicate Human Presence
/topic/snow-and-iceText duplicate Snow and Ice
/images/154249/arkansas-farmer...IMG-ALT Arkansas Farmers Face Lingering Floodwaters
/images/154249/arkansas-farmer...Text duplicate Arkansas Farmers Face Lingering Floodwaters
/topic/image-of-the-dayText duplicate Image of the Day
/topic/floodsText duplicate Floods
/topic/remote-sensingText duplicate Remote Sensing
/global-maps/MODAL2_M_AER_ODIMG-ALT Aerosol Optical Depth
/global-maps/MODAL2_M_AER_ODText duplicate Aerosol Optical Depth
/topic/atmosphereText duplicate Atmosphere
/blogs/earthmatters/?p=12353Subdomain IMG-ALT April Puzzler
/blogs/earthmatters/?p=12353Subdomain Text duplicate April Puzzler
/images/event/153026/2024-nort...IMG-ALT 2024 North Atlantic Hurricane Season
/images/event/153026/2024-nort...Text duplicate 2024 North Atlantic Hurricane Season
/topic/atmosphereText duplicate Atmosphere
/Features/ColorImage/IMG-ALT How to Interpret a Satellite Image: Five Tips and Strategies
/Features/ColorImage/Text duplicate How to Interpret a Satellite Image: Five Tips and Strategies
/topic/remote-sensingText duplicate Remote Sensing
/Features/BlueMarble/IMG-ALT Blue Marble Next Generation
/Features/BlueMarble/Text duplicate Blue Marble Next Generation
/topic/atmosphereText duplicate Atmosphere
/topic/landText duplicate Land
/topic/waterText duplicate Water
/topic/snow-and-iceText duplicate Snow and Ice
/global-maps/MOD14A1_M_FIREIMG-ALT Fire
/global-maps/MOD14A1_M_FIREText duplicate Fire
/topic/landText duplicate Land
/global-maps/MY1DMM_CHLORAIMG-ALT Chlorophyll
/global-maps/MY1DMM_CHLORAText duplicate Chlorophyll
/topic/lifeText duplicate Life
/topic/waterText duplicate Water
/collection/1702/renewable-and...Text duplicate IMG-ALT Renewable and Alternative Energy
/collection/1702/renewable-and...Text duplicate Renewable and Alternative Energy
/topic/landText duplicate Land
/topic/human-presenceText duplicate Human Presence
/collection/1722/air-qualityText duplicate IMG-ALT Air Quality
/collection/1722/air-qualityText duplicate Air Quality
/topic/atmosphereText duplicate Atmosphere
/topic/human-presenceText duplicate Human Presence
/images/event/152603/temperatu...IMG-ALT Temperature Extremes 2024
/images/event/152603/temperatu...Text duplicate Temperature Extremes 2024
/topic/heatText duplicate Heat
/Features/NightLights/Text duplicate IMG-ALT Earth at Night
/Features/NightLights/Text duplicate Earth at Night
/topic/atmosphereText duplicate Atmosphere
/topic/landText duplicate Land
/topic/human-presenceText duplicate Human Presence
/topic/remote-sensingText duplicate Remote Sensing
/biome/IMG-ALT Mission: Biomes
/biome/Text duplicate Mission: Biomes
/topic/landText duplicate Land
/topic/lifeText duplicate Life
/images/event/152498/2024-fire...IMG-ALT 2024 Fires in the Northern Hemisphere
/images/event/152498/2024-fire...Text duplicate 2024 Fires in the Northern Hemisphere
/topic/atmosphereText duplicate Atmosphere
/topic/landText duplicate Land
/topic/human-presenceText duplicate Human Presence
/images/event/151691/temperatu...IMG-ALT Temperature Extremes 2023
/images/event/151691/temperatu...Text duplicate Temperature Extremes 2023
/topic/heatText duplicate Heat
/Text duplicate IMG-ALT Earth Observatory
A-TITLE Earth Observatory
https://www.facebook.com/nasae...External Subdomain IMG-ALT Facebook
A-TITLE Facebook
http://twitter.com/nasaearth/External IMG-ALT Twitter
A-TITLE Twitter
http://instagram.com/NASAEarth/External IMG-ALT Instagram
A-TITLE Instagram
/subscribe/IMG-ALT Subscribe
A-TITLE Subscribe
/subscribe/feedsIMG-ALT RSS
A-TITLE RSS
/subscribe/feedsFeeds
/contact/Contact
/aboutAbout
/image-use-policyImage Use Policy
https://www.nasa.gov/about/hig...External Subdomain Privacy Policy
https://www.nasa.gov/accessibi...External Subdomain Accessibility
/contact/Paul Przyborski
/contact/Robert Levy
http://eospso.nasa.gov/External Subdomain EOS Project Science Office
https://www.nasa.gov/goddard/External Subdomain NASA Goddard Space Flight Center

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://earthobservatory.nasa.gov/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time of 0.68 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
This page loads 6 CSS files. This may affect the page load time negatively.
This page loads 15 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (83 kB).

HTTP Response Header

NameValue
servernginx
dateFri, 16 May 2025 08:28:15 GMT
content-typetext/html; charset=UTF-8
content-length84658
connectionkeep-alive
strict-transport-securitymax-age=31557600
cache-controlmax-age=300, public
etag"35f6b39043f8addd1fbb78e249b83790"
accept-rangesbytes
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 1,376 referring domains.
This page has 123,430 backlinks.
This page has backlinks from 982 different ip addresses.

Robots.txt

User-agent: *
Disallow: /Recommend/*
Disallow: /Contact/*
Disallow: /contact/*
Disallow: /Newsroom/*
Disallow: /images/related/*
Disallow: /js/*
Disallow: /xml/*
Disallow: *printall*
Disallow: /*.mpg$
Disallow: /*.mpeg$
Disallow: /*.mp3$
Disallow: /*.avi$
Disallow: /*.mov$
Disallow: /status/
Sitemap: https://earthobservatory.nasa.gov/sitemap.xml

Search preview

earthobservatory.nasa.gov
NASA Earth Observatory - Home
The Earth Observatory shares images and stories about the environment, Earth systems, and climate that emerge from NASA research, satellite missions, and models.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Earth77%Check
Earth Observatory75%Check
NASA73%Check
NASA Earth Observatory71%Check
Observatory70%Check
or cold65%Check
Earth Systems58%Check
Image54%Check
Satellite52%Check
Climate50%Check

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