I think technically they do not need to reach orbit just 0g which can happen on a ballistic trajectory. This test is between two tanks in the same vessel. But yeah orbit would be ideal as it gives more time in 0g
> The delivery [to NRHO] requires that Starship HLS be refueled in Earth orbit before boosting to the NRHO, and this refueling requires a pre-positioned propellant depot in Earth orbit that is filled by multiple (at least 14) tanker flights.
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[ 3.2 ms ] story [ 19.0 ms ] thread> The delivery [to NRHO] requires that Starship HLS be refueled in Earth orbit before boosting to the NRHO, and this refueling requires a pre-positioned propellant depot in Earth orbit that is filled by multiple (at least 14) tanker flights.