The phrase "observational data" is correct and can be used in written English.
For example, "The observational data showed a clear trend between the number of hours studied and test scores."
There are a number of dirty data in observation data set derived from ocean observing network.
"We have no observation data at Palu.
CIAO script chandra_repro uses acis_process_events to reprocess ACIS observation data.
Observation data is paramount in space use studies.
Loew, A. et al. Validation practices for satellite-based Earth observation data across communities.
Over my career I've carried out a number of roles, including work on remote sensing data and observation data.
Updated for parameter block file parameter deprecation and added note about early observation data.
Geoscience is a unique blend of lab experiments, field observation, data analysis, and computer modeling.
We note that the observation data are poor or non-existent beyond 17Å.
CIAO script chandra_repro, which uses hrc_process_events to reprocess HRC observation data.
Poll Observation Data from the Kenya General Elections held on 27 December 2007.
