This dataset collection contains basic gridded atmospheric and surface variables for the planet Mars over three Martian years (a martian year is 1.88 terrestrial years), as produced by data assimilation of spacecraft observations. Each file in the dataset spans 30 martian mean solar days (sols) during the science mapping phase of the National Aeronautics and Space Administrations's (NASA) Mars Global Surveyor (MGS) spacecraft, between May 1999 and August 2004. The dataset collection was produced by the re-analysis of Thermal Emission Spectrometer (TES) retrievals of nadir thermal profiles and total dust opacities, using the Mars Analysis Correction Data Assimilation (MACDA) scheme in a Mars global circulation model (MGCM). The MGCM used the UK spectral version of the model developed by the Laboratoire de Météorologie Dynamique (LMD) in Paris, France. MACDA was a collaboration between the University of Oxford and The Open University in the UK.