This page allows you to view the results of time and frequency comparisons between members of the Interamerican Metrology System (SIM). By entering the the date of the comparison and selecting two laboratories, any contributing SIM laboratory can compare their national time and frequency standard to any other SIM laboratory.

To view common-view results (for comparisons between two labs) complete the form entries and then click the SUBMIT button.

To view all-in-view common-view results (for comparisons between two labs) complete the form entries and then click the SUBMIT button. Unlike the "classic" common-view method above, this method does not align individual satellite tracks. It often improves the results over long baselines, but may degrade results over short baselines.

To view one-way GPS data from a single laboratory, complete the form entries and then click the SUBMIT button.