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faq.md

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 ### How do you know the GPS receivers in Gran Sasso and CERN are not introducing any systematic error?
 
-Metrology labs around the world use GPS time transfer techniques to  
-exchange observations of the delays of their local clocks with respect  
-to GPS clocks. These observations are then merged by the Bureau  
-International des Poids et Mesures (BIPM) in Paris to produce  
-Coordinated Universal Time (UTC). In addition to these techniques,  
-metrology labs also exchange observations using other independent
-means  
-such as Two-Way Satellite Time Transfer (TWSTT). In this setup, a  
-certain bandwidth is rented from a geostationary satellite operator to  
-establish a two-way link, which is completely independent of GPS.  
-Travelling atomic clocks (after accounting for relativity and other  
-effects) are a third way which is used to ascertain that GPS time  
-transfer is unbiased. The satellite receivers in Gran Sasso and CERN
-are  
-the same brand and model. So are the antennae and the antenna cables.  
-They have been characterized by two independent metrology labs (METAS  
-and PTB) using different methods, which agreed to within 2 ns even if  
+Metrology labs around the world use GPS time transfer techniques to
+exchange observations of the delays of their local clocks with respect
+to GPS clocks. These observations are then merged by the Bureau
+International des Poids et Mesures (BIPM) in Paris to produce
+Coordinated Universal Time (UTC). In addition to these techniques,
+metrology labs also exchange observations using other independent means
+such as Two-Way Satellite Time Transfer (TWSTT). In this setup, a
+certain bandwidth is rented from a geostationary satellite operator to
+establish a two-way link, which is completely independent of GPS.
+Travelling atomic clocks (after accounting for relativity and other
+effects) are a third way which is used to ascertain that GPS time
+transfer is unbiased. The satellite receivers in Gran Sasso and CERN are
+the same brand and model. So are the antennae and the antenna cables.
+They have been characterized by two independent metrology labs (METAS
+and PTB) using different methods, which agreed to within 2 ns even if
 conducted with a 2-year separation in time.
 
 ### Have you taken the antenna cable delay into account?
 
-Calibrations conducted by METAS and PTB both included the final cables  
-and antennae. This is a very important concept: inclusive calibration.  
-It is also used to calibrate other things like fiber links. You have
-to  
-try to include as much as possible of your final setup in the  
-calibration procedure. So at METAS, for example, both GPS receivers
-were  
-set up with their final cables and antennae, and their PPS outputs
-were  
-measured against the METAS reference PPS. This provided, in addition
-to  
-the relative calibration of interest, an absolute calibration with  
+Calibrations conducted by METAS and PTB both included the final cables
+and antennae. This is a very important concept: inclusive calibration.
+It is also used to calibrate other things like fiber links. You have to
+try to include as much as possible of your final setup in the
+calibration procedure. So at METAS, for example, both GPS receivers were
+set up with their final cables and antennae, and their PPS outputs were
+measured against the METAS reference PPS. This provided, in addition to
+the relative calibration of interest, an absolute calibration with
 respect to
 UTC.