Skimming through the pre-print (https://arxiv.org/pdf/1812.04040.pdf https://arxiv.org/pdf/1812.04040.pdf), it doesn't look like they're using the Earth's posit

Skimming through the pre-print (https://arxiv.org/pdf/1812.04040.pdf https://arxiv.org/pdf/1812.04040.pdf), it doesn't look like they're using the Earth's position along the orbit. Looks like on the order of ~hour per target.