All about QUB Files

The QUB file type is primarily associated with ISIS3.

QUB	File extension: QUB
	File type:	Data file

What is a QUB file

QUB files mostly belong to ISIS3. QUB files are part of the NASA Planetary Data System and serve as containers for planetary science imaging data.
Purpose:

Planetary Data Storage - They hold mission data including images and critical metadata from space missions.

Functionality:

Data is structured for detailed scientific analysis.

Requires specialized software to view and process the planetary imaging details.

FilExt.com tip: For more details, visit the ISIS3 page or the PDS_Image_Viewer site.

How can I open a QUB file?

You need a suitable software like ISIS3 to open a QUB file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your QUB file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a QUB file directly in the browser:. Just drag the file onto this browser window and drop it.

Online QUB Text Viewer

Choose your .qub file to analyze

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Online File Viewer

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Programs that open and convert QUB files:

ISIS3
See the previous paragraphs to learn more about the main application. QUB files are often referred to as ISIS3 data files because this type of file is primarily created or used by this software.
Qubus by KPMG
Electronic questionnaires, surveys etc. A QUB file is a questionaire for Qubus. This file is actually a Microsoft Access database, protected by a password, which seems randomly generated. It has a number of tables, but two are important for the questionaire: Node and Strings. Node fields such as Title, Tag and NodeNumber, which are numbers linking to a field in String. It also has fields with RTF (Rich Text) with the questions. The entries in the Node table are a linked list: the field NextChild points to a Node entry which is the child of this entry. Parent points to the upper level of the entry and PrevSibling and NextSibling point to the previous and next question, respectively.

QUB file format:

Each file has a definite file format, that is, how the stored data is arranged in the file. The file format can be determined based on the file extension and the signature (the first few characters of a file). If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. So you need a detailed analysis of a file to find out the format and the associated program. Below is our analysis of the QUB files:

QUB is seldom used as a file extension and includes different formats for different programs. The two most common formats are as follows:

35% of all QUB files use the same file format, which can be identified by the letters "PDS_VERSION_ID" at the beginning. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are often between 83 KB and 30 MB in size. The file type was developed only in the last few years. The files contain the following words: RECORD_BYTES, FILE_RECORDS, LABEL_RECORDS, PDS_VERSION_ID = PDS3, /* File Identification and Structure */, /* Pointers to Data Objects */, RECORD_TYPE = "FIXED_LENGTH" and ^HISTORY.
15% of all QUB files start with the magic bytes CCSD3ZF0000100000001NJPL3IF0PDS200000001, which are always the first bytes of this file format. These files contain neither text nor words, but only data. QUB files are between 320 KB and 6 MB in size. Certain words are almost always found in the files, such as /* File Structure */, FILE_RECORDS, LABEL_RECORDS, RECORD_BYTES = 512, RECORD_TYPE = FIXED_LENGTH, CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL, CCSD3ZF0000100000001NJPL3IF0PDS200000001 = CASSFDU_LABEL, CHECKSUM and FILE_STATE =.

All the rest of the QUB files (50%) have different formats, such as DkEj. These files are often connected to nasa, odtsdp or data. If you want to find out which format your QUB file belongs to, just click on the button "Choose your .qub file to analyze".

Technical Data for QUB File Extension

File classification:

Data

Related files:

lbl, pds, cub, txt, zip, img, dat

a qub Data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with QUB files

Associate the QUB file extension with the correct application.
Update your software that should actually open data files. Because only the current version supports the latest QUB file format. Search, therefore, e.g. on the manufacturer website after an available ISIS3 update.
To make sure that your QUB file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .QUB file online - secure, fast, and no downloads needed.