Diff for 'FAQ'

Do not forget to check the dataset pages for information!

Web interface

Which web browser is supported by MarsSI?

We do not target specific browsers, so any standard compliant web browser should work with MarsSI web interface.

Will MarsSI allow me to display/analyse data?

Sorry, MarsSI helps you to find and process data. There is already a lot of excellent tools or environments to work with the data, for example the team behind MarsSI works a lot with Python (+nympy, scipy, GDAL) and GIS softwares (QGIS, ArcGIS).

I forgot my login/password

Use this link: https://marssi.univ-lyon1.fr/MarsSI/accounts/password_reset

You need to have access to the email address used in the registration process.

I would like to change my password

Use this link : https://marssi.univ-lyon1.fr/MarsSI/accounts/password_change

Data download

Why do MarsSI need to download data?

MarsSI is not a full PDS mirror, we retrieve products only when a user express interest in it to be more efficient about bandwidth and storage.

But once a product is downloaded/processed, it will be kept!

Why do I need to copy data?

MarsSI has now a lot of products that would be hard to browse if we just gave access to the raw directories. The "copy" action allow you to create a subset of the data that interest you and have a cleaner view when connecting to the SFTP server.

That being said, we are thinking of easier ways to do so in the future.

I requested a copy, but my SFTP directory is empty

You might have clicked the "Copy" button without selecting any products in the "Data processed" pane : be sure to have selected to copy.

Which SFTP client should I use?

Our tutorial describe using Filezilla because we think most people would be comfortable with it, but if you are more familiar with another client, you can use it and just get the settings from the documentation.

Data processing

My processing failed, can I run it again?

MarsSI pipelines are deterministic. If some system-wide bug happens, we will restart the processing jobs, but in normal conditions it means that a failed job will result in a failed job, so job re-run are not possible.

There is an exception for "downloaded" products however: it can happen that remote mirrors fails to deliver the data, but we expect them to succeed if retried later, so if a product is the result of a download and fails, it will be reset after 24h. Other products depending on this failed product (eg. DEMs failing because an image download failed) will also be reset.

DEM confidence map

We rely on the Ames Stereopipline software to produce our DEMs, which do not output information such as confidence map. They stated in the past that producing this information was really hard in their pipeline and was not planned in the foreseeable future.

DEM intermediary products

We do not provide intermediary products such as aligned left/right images, raw or refined correlation results. Those products use a lot of disk space and are sometime not straightforward to open and read.

MarsSI's DEMs are not vertically aligned with mine

MarsSI DEM are vertically referenced to the areoid. You might be trying to compare them to DEM based on the martian ellipsoid/sheroid.