ARLA/CLUSTER: Planetary Society solicita relatórios de escuta do satélite Lightsail-2, lançado a 24 Junho com beacon em 437,025 MHz

[João Costa > CT1FBF]

Lightsail-2 scheduled for launch June 24 - Beacon on 437.025 MHz

LightSail is a citizen-funded project from The Planetary Society.
This cubesat will be propelled solely by sunlight, to Earth orbit.
LightSail 2 was scheduled to launch aboard a SpaceX Falcon Heavy on
June 24, 2019, and we will attempt the first, controlled solar sail
flight in Earth orbit.

LightSail 2 will ride to space aboard the Department of Defense Space
Test Program-2 (STP-2) mission which will send 24 spacecraft to 3
different orbits. LightSail 2 itself will be enclosed within Prox-1, a
Georgia Tech-designed spacecraft originally built to demonstrate
close-encounter operations with other spacecraft. Prox-1 will deploy
LightSail 2 seven days after launch.

After a few days of health and status checks, LightSail 2's four
dual-sided solar panels will swing open. Roughly a day later, four
metallic booms will unfurl four triangular Mylar sails from storage.
The sails, which have a combined area of 32 square meters [344 square
feet], will turn towards the sun for half of each orbit, giving the
spacecraft a tiny push no stronger than the weight of a paperclip.
For about a month after sail deployment, this continual thrust should
raise LightSail 2's orbit by a measurable amount.

LightSail 2 will fly in a 24-degree inclination, 720 km, circular
orbit. At latitudes of 42 degrees north it will reach a maximum
elevation of 10 degrees above the horizon.

Lightsail-2 has been issued an experimental radio license WM9XPA and
transmit on 437.025 MHz. A morse beacon will transmit the callsign
every 45 seconds. A packet beacon will transmit AX.25, FSK 9K6 bps
data.

Beacon information is available at:
http://tinyurl.com/ANS-153-Lightsail-Morse-Beacon
Documentation of the downlink telemetry data structure is posted at:
http://tinyurl.com/ANS-153-Lightsail-Telemetry

Thanks to ANS and the Planetary Society for the above information