deOrbitSail

deOrbitSail

Mission

The DeorbitSail project is a collaboration to build a 3U CubeSat sized satellite with a deployable sail that will demonstrate rapid deorbiting.

deOrbitSail

deOrbitSail-cleanroom

    Specifications:

  • Satellite Dimensions: 3U (10 cm x 10 cm x 34 cm)
  • Sail Dimension: 4 m x 4 m
  • Deorbit Time: Less than 180 days
  • Launch Station: SLP, SDSC SHAR , India
  • Launch Date & Time: 10thJuly ‘15 / 16:27 hrs UTC
  • Altitude: 600 km
  • Orbit: Polar Sun -synchronous
    Objectives:

  • Provide research in the field of deorbiting
  • Provide a demonstrated and verified design for deorbiting of satellites and debris
  • Provide effective and efficient in-space propulsion technologies based on solar

Orbital parameters

Name                 deOrbitSail
NORAD                ?
COSPAR designation   ?
Inclination (degree) 97.984
RAAN                 81.088
Eccentricity         0.0007584
ARGP                 273.958
Orbit per day        14.75593446
Period               1h 37m 35s (97.58 min)
Semi-major axis      7 021km
Perigee x apogee     638 x 649 km
Drag factor          0.000013828 1/ER
Mean Anomaly         86.095

Beacon

145.975 MHz USB 1200bps BPSK AX.25

Downlink

145.975 MHz USB 1200bps BPSK AX.25

Call

DOS

Preliminary TLE

DEORBITSAIL
1 55554U 58056A   15191.72643157  .00000000  00000-0 +13828-4 0   335
2 55554  97.9842  81.0881 0007584 273.9578  86.0949 14.75593446209360

Telemetry

Beacon Format:

255	Message ID 	Offset	Message Data
1byte	1byte	1byte	Varying Length

The data contained in the message ID is given on the Message List tab.

The offset in the beacons third byte should be added to the offset in
the message on the telemetry tab.

The beacon is setup to rotate around the following telemetry datasets#

Message ID		Offset	Length (Bytes)

136	Satellite State	0	5
185	EPS Telemetry	12	2
136	Satellite State	0	2
184	Radio Telemetry	0	16
185	EPS Telemetry	0	35

Beacon timing is variable depending on the power levels / ground command.
The expectation is that it should broadcast roughly every 30 seconds.

If you have any telemetry or TLE/frequency information, please send it to deorbitsail.messages [at] gmail.com so we can quickly learn our satellite state.

Status

Signals are received and decoded, first with the help of the WebSDR in Johannesburg South Africa and later in the evening directly by my own ground station.

deOrbitSail WebSDR

2015-07-10 19:57:51.380 UTC: from DOS to SSC 
1  > 01 49 01 47 00 18 00 00 00 D6 1F 00 00 40 04 73 00 03 00 02 
21 > 00 03 00 0C 00 01 00 09 0A 09

deOrbitSail-SDR

PSLV-C28-Launch-configurationTo be launched July 10th 2015 at 16:28 UTC with the ISRO PSLV-C28 / DMC3 Mission. The satellite is successfully launched and active.


Homepage and other references:

Main website: deOrbitSail
Science and Technology
Mission overview
deOrbitSail eoPortal information