the.com/uplink

The whispered shout from earth to sky, where your signal climbs against gravity itself.

means A communication link or transmission sent from a ground station up to a satellite or other airborne or orbital receiver.

from A transparent compound of "up" and "link," born in the space and telecommunications age of the mid-20th century, when engineers needed a tidy word for the signal traveling earthward-to-skyward, paired with its mirror twin "downlink." "Link" itself is old and Germanic, related to a chain's loop and to the idea of joining; here the joining stretches vertically into orbit.

direction: Earth-to-satellite, the harder half of the conversation
frequency: Uses higher bands than the downlink reply
power: Ground stations push hard to reach orbit
latency: Geostationary trips add a quarter-second each way
weak link: Rain fade can choke the climbing signal

for instance

iridium satellite network — 66 active satellites providing global voice and data connectivity since 1998

intelsat global service — 55+ geostationary satellites transmitting tv and data from fixed ground stations worldwide

viasat ka-band uplink — ground stations in tempe, arizona transmitting broadband to viasat-2 satellite over north america