GENSO, CubeSats and Space Dial Tone

Full text

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GENSO,

 

CubeSats

 

and

 

Space

 

Dial

 

Tone

Naveen N. Purushotham 

Department of Electrical and Computer Engineering, Univ. of New Mexico

Craig J. Kief

Configurable Space Microsystems Innovations and Applications Center (COSMIAC) R. Scott Erwin, Joshua F. Androlewicz and James Lyke

AFRL, Space Vehicle Directorate

and Julius R. Jackson

Department of Mathematics and Computer Science, Central State University This Research funded by the Air Force Research Laboratory

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Problems to be Solved

Problems

 

to

 

be

 

Solved

How

o do e b ea t e

 

do

 

we

 

break

 

the

 

mold

o d o o e g ou d stat o

 

of

 

one

 

ground

 

station

 

– one

o e

 

satellite

 

for

 

science

 

missions?

For

 

a

 

3

6

 

month

 

mission,

,

 

is

 

it

 

worth

 

it

 

to

 

build

 

a

 

ground

g

 

station?

How

 

do

 

we

 

facilitate

 

the

 

Ground

 

segment

g

 

to

 

make

 

it

 

easier

 

to

 

get

 

educational

 

missions

 

to

 

space?

(3)

Background – GENSO

Background

 

GENSO

Global

 

Education

 

Network

 

for

 

Satellite

 

Operations

 

(

)

f

h h ll

h

(GENSO)

 

is

 

a

 

software

 

standard

 

which

 

allows

 

each

 

ground

 

station

 

on

 

the

 

network

 

to

 

communicate

 

with

 

non local spacecraft and transmit data to different

non

local

 

spacecraft

 

and

 

transmit

 

data

 

to

 

different

 

ground

 

terminals

 

that

 

have

 

access

 

to

 

the

 

specific

 

satellite.

GENSO

 

was

 

developed

 

primarily

 

by volunteers in the educational

by

 

volunteers

 

in

 

the

 

educational

 

/

 

amateur

 

radio

 

community.

 

ESA

 

took

 

the

 

lead

 

under

 

auspices

 

of

 

the

 

International

 

Space

 

(4)

GENSO Network Details

GENSO

 

Network

 

Details

*AUS = Authentication Server

*GSS G d St ti S

AUS – Primary in Vigo/Backup planned for Cal Poly to

t EL NA MCC on

*GSS = Ground Station Server *MCC = Mission Control Client

support ELaNA MCC with GSS CC o Laptop GSS GSS GSS

All GSS receive and distribute a piece of

One MCC will be assigned for

All GSS receive and distribute a piece of the puzzle but only one MCC sees the entire picture. Since the GSS is tied to a physical ground station, it only sees what is One MCC will be assigned for

each GENSO registered

spacecraft when fully functional

available during a pass whereas the MCC has access to the aggregate of all downloaded data.

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Background and Current Status

Background

 

and

 

Current

 

Status

• GENSO Release 1 (R1) was delivered in 2009 and the current phase

• GENSO Release 1 (R1) was delivered in 2009, and the current phase  is regarded as "beta testing by invitation only"

• R1 is officially receive only.  As of now, R1 has shown the capability  to support manual transmissions. A human has to be at the GSS to  push the transmit authorization

• GENSO R2 should be transmit and receive R2 is still in development

• GENSO R2 should be transmit and receive. R2 is still in development  but we hope it will become operational in 2011

• Besides Cal Poly and COSMIAC, there are no known GENSO GSS  sites in the US  

• Current European Developers Forum meets weekly at 1am  Albuquerque time for an online IM session

Albuquerque time for an online IM session

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GENSO – Hardware Details

GENSO

 

Hardware

 

Details

With

 

GENSO,

 

any

 

hardware

 

can

 

be

 

used

 

but

 

you

 

have

 

i

d i

to

 

write

 

your

 

own

 

drivers

– Pros: any hardware can be used

Cons virtually no drivers exist for any hardware

– Cons: virtually no drivers exist for any hardware

Process

 

to

 

become

 

active

 

with

 

GENSO

 

is

 

to:

 

1 Complete and submit an application for the GENSO

– 1. Complete and submit an application for the GENSO  network 

– 2. Download the software 

– 3. If your equipment is not currently supported, write your  own drivers, test them and then submit for future releases.

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GENSO

Future

GENSO

 

Future

We need developers

We

 

need

 

developers

COSMIAC,

 

Cal

 

Poly

 

and

 

Drexel

 

have

 

created

 

a

 

b

d d

l

kl

l

US

 

based

 

developers

 

group

 

– Weekly

 

telecoms

 

on

 

Tuesday

 

evenings

(8)

SDR

 

– A

 

pathway

 

to

 

merge

 

all

 

the

 

above

SDR allows dynamic reconfiguration of one piece

SDR

 

allows

 

dynamic

 

reconfiguration

 

of

 

one

 

piece

 

of

 

hardware

 

to

 

perform

 

multiple

 

radios

 

capabilities thus reducing the need for many

capabilities

 

thus

 

reducing

 

the

 

need

 

for

 

many

 

racks

 

of

 

different

 

radio

 

equipment.

Firehose Radio

COSMIAC CubeSat Board

(9)

COSMIAC

 

Initial

 

Ground

 

Station

Began

 

satellite

 

communications

 

efforts

 

two

 

years

 

ago

 

– sister

 

site

 

on

 

base

 

6

 

months

 

ago

Utilized

 

HAM

 

radios

 

for

 

testing:

 

AO

51,

 

AO

27,

 

etc.

(10)

Current COSMIAC Ground Station

Current

 

COSMIAC

 

Ground

 

Station

The groundg  station is the 

communication link between  the satellite, GENSO and 

other SDR activities The other SDR activities. The  GENSO system controls the  tracking, position and 

frequency channel control.

(11)

CubeSat Initial Objectives

CubeSat

 

Initial

 

Objectives

Started

 

in

 

1999:

 

Stanford

Cal

 

Poly

 

Team

Facilitate

 

Access

 

to

 

Space:

Rapid

 

Development

 

Time

 

(1

2

 

years,

 

Student

 

Career)

L

C

Low

Cost

Launch

 

Vehicle

 

Flexibility

U

St d d (22

)

Use

 

Standards

 

(22

 

pages)

University

 

Projects

Industry,

 

Radiation

 

and

 

Larger

 

(12)

Some Facts as of 2009

Some

 

Facts

 

as

 

of

 

2009

28 C beSats in LEO (44 La nched)

28

 

CubeSats

 

in

 

LEO

 

(44

 

Launched)

Over

 

100

 

Developers

 

Worldwide

Dedicated

 

Workshops/Meetings

CubeSat

 

Industrial

 

Suppliers

pp

Th lid t f

These slides courtesy of Dr. Jordi Puig-Suari at Cal Poly

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Who Cares about CubeSats?

Who

 

Cares

 

about

 

CubeSats?

Boeing

 

Colony

 

II

AFRL SBIR and XR Solicitations

AFRL

 

SBIR

 

and

 

XR

 

Solicitations

NSF

 

and

 

ELaNA

 

Solicitations

Not

 

all

 

missions

 

can

 

be

 

done

 

with

 

CubeSats

 

but…

R

bl f

d bl t tb d f

i ti

Reasonably

 

fundable

 

testbed

 

for

 

new

 

communications

 

techniques,

 

space

 

weather

 

and

 

other

 

algorithm

 

verification

 

By

 

far

 

the

 

#1

 

cause

 

of

 

program

 

failures

 

is

 

failures

 

to

 

be

 

funded – that accounts for probably 98% of failed missions

funded

 

– that

 

accounts

 

for

 

probably

 

98%

 

of

 

failed

 

missions

Rick Fleeter – The Logic of Microspace

(14)

Space Dial Tone?

Space

 

Dial

 

Tone?

Is

 

there

 

a

 

way

y

 

to

 

merge

g

GENSO

Space Plug

Space

 

Plug and play

and

play Architecture (SPA)

 

Architecture

 

(SPA)

SDR

RF Ground Stations

RF

 

Ground

 

Stations

(15)

Plug

and

play

 

Communications

l

/

l

Analogy

 

/Generalization

Typical

 

Communications

 

Between

 

People

 

on

 

the

 

G

d i

l

“di l t

t h ”

Ground

 

involve

 

“dial

 

tone

 

metaphor”

Actual

 

dial

 

tone

 

used

 

on

 

land

 

lines

Emergence of cellular telephony

Emergence

 

of

 

cellular

 

telephony

• Mimics the dial tone metaphor 

• Changing vendors doesn’t alter the concept of 

communications communications

Contrasting

 

picture

 

with

 

space

 

communications

Changing

 

from

 

AFSCN,

 

TDRSS,

 

ham

 

radio,

 

etc

 

involves

 

f

d

l h

i h

k i h

d

fundamental

 

changes

 

in

 

how

 

we

 

work

 

with

 

ground

 

architectures

 

No

 

concept

 

like

 

the

 

dial

 

tone

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Eventual

 

Expansion

 

to

 

multiple

 

h

communications

 

architectures

• Just as one would shopp for cell  phones / plans, cubesat 

developers will be able to  explore different comm explore different comm 

options using different “phone  instruments” but same “space 

TDRS Amateur radio

dial tone” access concept

• Each connects to cubesat  through same modular

TDRS

through same modular  interface

• Each allows user to connect to  same universal portal (space  dial tone) to access 

information

BGAN

Iridium, Etc.

(17)

Simplified

 

Universal

 

Portal

 

Architecture

802.11 (lab test) BGAN

TDRS‐MA Amateur radio WiMax

(lab test) Z B5 Z1 Z2 ZB4 Z B5 ZB2 BGAN  Terminal(s) TDRSS

ground Amateur radio stations Y2

ZB1 adapter adapter ZB2 U1 U1 U1 U1 U1 Internet U1 U1 U1 Y1 Y1 Y1 Y1 Universal portal  server SMS text  “twitter”

Space Dial Tone Users Y2

Figure

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