SpaceX in its recovery attempts can either do a Return To Launch Site (RTLS) or land downrange on an ASDS landing barge.
The Telesat 19V and 18V payloads were some of the heaviest payloads on the manifest for a single stick Falcon 9. (Falcon Heavy is for heavier payloads). The numbers appear to be aboout 7900Kg. This is much larger than the previously largest GTO orbit payload launch where they recovered the first stage downrange.
To compensate for the additional mass it seems like they have a couple of options. First off they launch to a lower GTO that requires the payload itself to migrate to GEO. This costs the payload propellant, and may take away years of service life. (Thus ArianeSpace will advertise its competitiveness since they can deliver direct to GEO, not a lower energy GTO. So while the launch might be cheaper, you waste fuel compensating.)
What I was wondering is for the heavy GTO missions, do they move the ASDS further and further downrange to recover the first stage? Thus reducing the fuel reserved for landing?
Or do they just launch to lower energy GTO to compensate? I have seen GTO-xxxx used to represent the Delta V required to get to GEO.
Someone collected the SpaceX GTO Missions information. They suggest a naming model of GTO-1500 or GTO-1800.
They define the GTO Delta V as:
GTO ΔV : The change in velocity in m/s that is required for the payload to reach GEO. A "standard" GTO insertion from Cape Canaveral, which sits at around 28.5° latitude, is GTO-1800. This means that 1800 m/s are required to reach geostationary orbit at 0° inclination.
Thus there are different orbits, that require more or less delta-v to finalize to GEO.
If you want to laugh, people have been automating screen scraping the data in the live video feed, and calculating launch/velocity/altitude profiles from that data. Here is a great example from Veebay.
While looking at that, same user had a landing location visualization that is helpful for this topic.