Irsa.ipac.caltech.edu - SEO Checker

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Overview of the SEO Check
Meta information
69% 
Page quality
48% 
Page structure
79% 
Link structure
100% 
Server
78% 
External factors
100% 
SEO Score
Response time
1.06 s
File size
10.90 kB
Words
25
Media files
6
Number of links
10 internal / 1 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
IRSA
The page title is too short. (48 pixels of 580 max pixel length) Optimize title
The page title is only one word.
There are no duplicate words in the title
Meta description
(Critically important)
IRSA curates the science products of NASA's infrared and submillimeter missions
The length of the meta description is perfect. (502 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)
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 character encoding is not specified.
The character encoding is not specified in the HTTP header.
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=1020
apple-mobile-web-app-capableyes
descriptionIRSA curates the science products of NASA's infrared and submillimeter missions
og:typenon_profit
og:site_nameIRSA
Content-Typetext/html; charset=UTF-8
Cache-Controlno-cache
Pragmano-cache
ExpiresEmpty
X-UA-CompatibleIE=edge,chrome=1

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Page quality

Content
(Critically important)
There are only 25 words on this page. Use at least 250 words to provide useful information.
Words from the H1 heading are not used in the page content.
No paragraphs were detected.
8% of the text are stop words.
No placeholders texts or images were found.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
Multiple viewport tags are given. There should only be one.
A viewport "initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" is provided.
At least one Apple touch icon is specified.
This page only loads 1 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 6 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
/frontpage/images/ipac_logo-56x40.pngIpac_logo
/frontpage/images/Icon_Catalogs.pngCatalogsSearch for and visualize catalogs using forms or SQL
/frontpage/images/Icon_IRSAViewer.pngIrsaViewerSearch for and visualize multi-mission images, catalogs
/frontpage/images/Icon_FinderChart.pngFc_logoSearch for and visualize popular survey images and catalogs for your sources
/frontpage/images/Icon_API.pngVOWrite programs to access data

Page structure

H1 heading
(Critically important)
NASA/IPAC Infrared Science Archive
The H1 heading is perfect.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 NASA/IPAC Infrared Science Archive
H3 Search for Source
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 1 external links on this page.

Found links on this page

LinkAttributesAnchor text
http://www.ipac.caltech.edu/External Subdomain IMG-ALT Ipac_logo
https://irsa.ipac.caltech.edu/NASA/IPAC Infrared Science Archive
/docs/irsa_solarsystem_guide.htmlGuide for Solar System Observers
/applications/GatorIMG-ALT Catalogs
/irsaviewerIMG-ALT IrsaViewer
/applications/finderchartIMG-ALT Fc_logo
/voapi.htmlIMG-ALT VO
/irsa-dataQA.htmlContribute Data
/documentation.htmlDocumentation
/docs/howto/tutorials.htmlVideo Tutorials
/docs/help_desk.htmlHelp Desk

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://irsa.ipac.caltech.edu/frontpage/"
HTTP header
(Important)
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is slow (1.06 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
This page only loads 1 CSS files. That's ok.
This page only loads 1 JavaScript files. That's good!
The file size of the HTML document is fine (11 kB).

HTTP Response Header

NameValue
dateThu, 12 Sep 2024 04:39:29 GMT
serverApache/2.4.10
content-typetext/html
content-length2751
accept-rangesbytes
etagW/"11203-1719450616000"
last-modifiedThu, 27 Jun 2024 01:10:16 GMT
content-encodinggzip
set-cookie108 Characters
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 36 referring domains.
This page has 234 backlinks.
This page has backlinks from 36 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Disallow: /error/
Disallow: /ttweb/
Disallow: /stats/
Disallow: /cgi-bin/
Disallow: /tps/
Disallow: /workspace/
Disallow: /work/
Disallow: /2massqa/
Disallow: /ibe/qos
Disallow: /ibe/error/
Disallow: /ibe/data/
Disallow: /ibe/search/
Disallow: /ibe/sia/
Disallow: /IBE/
Disallow: /data/download/
Disallow: /data/Planck/cutouts/
Disallow: /data/Planck/ercsc_v1.3/ercsc_cutouts/
Disallow: /data/Planck/release_1/beams/unf_beams/files/
Disallow: /data/Planck/release_1/pccs1_cutouts/
Disallow: /data/Planck/release_2/all-sky-maps/maps/
Disallow: /data/Planck/release_2/beams/
Disallow: /data/Planck/release_2/toi/
Disallow: /data/IRAS_Level1/laundr_data/
Disallow: /data/ZTF/lc/
Disallow: /*.fits$
Disallow: /*.zip$
Disallow: /*.gz$
Disallow: /*.tgz$
Disallow: /*.h5$
Disallow: /*.hdf5$
Disallow: /*.parquet$

User-agent: Wget
Disallow:

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irsa.ipac.caltech.edu › frontpage
IRSA
IRSA curates the science products of NASA's infrared and submillimeter missions

Most important keywords

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

KeywordResultRecheck
NASA62%Check
Infrared62%Check
Science62%Check
IPAC60%Check
Archive50%Check
Search40%Check
Source40%Check
Catalog40%Check
Data36%Check
Help Desk34%Check
Show more keywords and terms

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