Acd-ext.gsfc.nasa.gov - SEO Checker

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Overview of the SEO Check
Meta information
85% 
Page quality
47% 
Page structure
70% 
Link structure
91% 
Server
35% 
External factors
100% 
SEO Score
Response time
0.61 s
File size
10.80 kB
Words
461
Media files
3
Number of links
16 internal / 29 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
For Our Colleagues
The page title is too short. (175 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
Scientific and technical content intended for our scientific colleagues
The length of the meta description is perfect. (418 pixels out of 1000 max pixel length)
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
Server location: United States of America
The language is not specified in the HTML markup.
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 4.01 Strict is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
No favicon is linked in the HTML code.

Meta tags

NameValue
titleFor Our Colleagues
descriptionScientific and technical content intended for our scientific colleagues
keywordscolleagues, goddard, gsfc, nasa
orgcode614
rnoJames.F.Gleason
content-ownerJames.F.Gleason
webmasterLeslie.R.Lait
Content-Typetext/html; charset=UTF-8
Pragmano-cache
Expires-1

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
There are only 461 words on this page. Good pages should have about 800 words of useful content.
37.5% of the text are stop words.
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 15.63 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
No Apple touch icon is specified.
This page only loads 2 JavaScript files. That's good!
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 9 tags for this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
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
/Images/nasa_header_logo1.gifNASA Logo, National Aeronautics and Space Administration
/Images/nav_bottom.pngNo alt attribute provided
/Images/goddardsignature.pngGoddard Signature

Page structure

H1 heading
(Critically important)
National Aeronautics and Space Administration
Too many H1 headings
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 National Aeronautics and Space Administration
H1 Atmospheric Chemistry and Dynamics Laboratory (Code 614)
H1 For Our Colleagues Scientific/Technical Information
H1 For Our Colleagues
H2 Goddard Space Flight Center
H2 Flight Projects | Sciences and Exploration
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (29) on this page.

Found links on this page

LinkAttributesAnchor text
http://www.nasa.gov/New window External Subdomain IMG-ALT NASA Logo, National Aeronautics and Space Administration
http://www.nasa.gov/External Subdomain National Aeronautics and Space Administration
http://www.nasa.gov/goddard/External Subdomain Goddard Space Flight Center
https://acd-ext.gsfc.nasa.gov/Anchor Skip Navigation (press 2)
A-TITLE Skip Navigation
http://fpd.gsfc.nasa.gov/External Subdomain Flight Projects
http://science.gsfc.nasa.gov/6...External Subdomain Sciences and Exploration
http://atmospheres.gsfc.nasa.g...External Subdomain Atmospheric Chemistry and Dynamics Laboratory (Code 614)
https://acd-ext.gsfc.nasa.gov/For Our Colleagues
/index.htmlHome
/People/index.htmlPeople
/Data_services/index.htmlData Services
/Missions/index.htmlMissions
/Projects/index.htmlProjects
/Documents/index.htmlDocuments
/index.htmlText duplicate Home
http://science.gsfc.nasa.gov/s...External Subdomain Organizational Web Site
https://webdir.nasa.gov/pages/...External Subdomain Look Up NASA People
http://acd-int.gsfc.nasa.gov/External Subdomain Internal-only Lab Site
http://atmospheres.gsfc.nasa.g...External Subdomain public-friendly web site
/People/index.htmlStaff Web Pages
/Data_services/index.htmlText duplicate Data Services
http://avdc.gsfc.nasa.gov/External Subdomain Aura Data Validation Center
http://ozonewatch.gsfc.nasa.gov/External Subdomain Ozone Hole Watch
http://ozoneaq.gsfc.nasa.gov/External Subdomain Total column ozone data (TOMS and OMI)
http://so2.gsfc.nasa.gov/External Subdomain Global Sulfur Dioxide Monitoring
http://acdb-ext.gsfc.nasa.gov/...External Subdomain Merged Ozone Data (MOD) Profile/Total Ozone
http://acdb-ext.gsfc.nasa.gov/...External Subdomain Meteorological plots
http://croc.gsfc.nasa.gov/shad...External Subdomain SHADOZ tropical ozonesondes
http://croc.gsfc.nasa.gov/aero...External Subdomain AERONET trajectory analyses
http://acdb-ext.gsfc.nasa.gov/...External Subdomain Tropospheric ozone from the "cloud-slicing" technique
http://acdb-ext.gsfc.nasa.gov/...External Subdomain Ground-based and airborne LIDAR data
http://airquality.gsfc.nasa.gov/External Subdomain OMI Nitrogen Dioxide (NO2)
/Projects/index.htmlText duplicate Projects
/Projects/GEOSCCM/index.htmlGoddard Chemistry-Climate Model Project (GEOSCCM)
http://tropo.gsfc.nasa.gov/External Subdomain Tropospheric studies
http://gmi.gsfc.nasa.gov/External Subdomain Global Modeling Initiative (GMI)
/Missions/index.htmlText duplicate Missions
http://aura.gsfc.nasa.gov/External Subdomain Aura
http://uars.gsfc.nasa.gov/External Subdomain UARS Legacy Site
/Documents/index.htmlText duplicate Documents
/Documents/O3_Assessments/WMO Ozone Assessments
https://www.nasa.gov/accessibi...New window External Subdomain Accessibility
https://www.nasa.gov/about/hig...New window External Subdomain Privacy Policy & Important Notices
https://www.nasa.gov/New window External Subdomain No Text
https://www.nasa.gov/goddardExternal Subdomain IMG-ALT Goddard Signature

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://acd-ext.gsfc.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 0.61 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 only loads 1 CSS files. That's ok.
This page only loads 2 JavaScript files. That's good!
The file size of the HTML document is fine (11 kB).

HTTP Response Header

NameValue
dateTue, 26 May 2026 04:10:09 GMT
serverApache
x-frame-optionsSAMEORIGIN
strict-transport-securitymax-age=31536000; includeSubdomains;
last-modifiedFri, 01 May 2026 06:17:02 GMT
etag"2b40-650bb87775ba7"
accept-rangesbytes
content-length11072
content-typetext/html; charset=utf-8
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 139 referring domains.
This page has 157 backlinks.
This page has backlinks from 36 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

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acd-ext.gsfc.nasa.gov
For Our Colleagues
Scientific and technical content intended for our scientific colleagues

Most important keywords

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

KeywordResultRecheck
Colleagues70%Check
Space61%Check
NASA space59%Check
National56%Check
Aeronautics56%Check
Administration56%Check
Scientific55%Check
Technical55%Check
Scientific Technical55%Check
NASA54%Check
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