Application of WAG in e-CORCE programme Prepared by: [email protected] WGISS26, 23 rd Sept.2008, Boulder, Colorado

Application of WAG in e-CORCE programme

Prepared by: [email protected]

WGISS26, 23rd Sept.2008, Boulder, Colorado

Antikidis JP, IGARSS, Boston 10th july 20082

1 meter, 1 Earth, 1 to 7 day ?


The one-meter, one-day, one-Earth nightmare !

Some few figures extrated from current state of the art : 5x10 pixels/day= more than 10 000 000 000 000 000 bits

Overall satellite system raw troughput around 7000 Gigabits/s !!According to present sensor technologies (20 000 pixels CCDs)

means 125 satellites @67 Gb/s !!!20 receiving centre with 700 Gb/s dump speed !!!

How to break the information wall !!! ?

We need to COMPRESS & DISTRIBUTE the information flow ! COMPRESS: Psycho-visual image compressionDISTRIBUTE: Receive and treat the information in a fully decentralised fashion without having centric facilities

WAG is the solution


e-CORCE is a Grid-based distributed instrument

Three fully integrated technical layers as a unified concept:

■ THE SPACE CELLULAR LAYER:Makes use of a fully automated satellite constellation covering the whole earth in a systematic fashion (“Saturation”). Full cover is achieved typically in a 1 day time with a a 1 meter ground resolution (100 or more units are contemplated)

■ THE TELECOM CELLULAR LAYER:Satellites are able to send immediatly their highly compressed (jpeg) information to ground centres. Telecom operation will be automated and highly simplified in such a way no station operator is required. Use of IP concept will suppress the need for separate TM/TC channels.

■ THE GROUND CELLULAR LAYER (Wide Area Grid) Owing to the enormous quantity of information to be treated in a one day time, all processes will be fully distributed all over the Earth and allow an acceptable local workload. Grid technology is able to carry this organisation keeping in mind the Earth mosaic will never be centralised leading to a “Virtual Earth creatioon” (Looksd like e-Tube technology)

e-CORCE cannot exist without getting together the full association of three highly distributed technical layers that makes it one and only one instrument spread all other the earth !

e-CORCE cannot exist without getting together the full association of three highly distributed technical layers that makes it one and only one instrument spread all other the earth !


e-CORCE Micro-Satellites design

■ Flying geometry with sight direction perpendicular to speed vector

Along flight propulsion direction Easy accomodation of donwlink antenna

Earth

Speed

■ Multi-plan compatibility 10% Increased solar arrays dimension Bidimensionnel TDI

■ Instrument design

Aperture Ø 300 mm 14 stages TDI 4 CCD arrays with 7 000 pixels 3 mirors Korsch Télescope SiC based opto-mechanical design Mass < 40 kg Power < 120 W


Psycho-visual image compresion (gain=50)

Psycho-visual data compression features (geared to internaut use)- No need for cloud cover handling !- No need for sea surfaces on/off

= Automatic bit budget Compresion over clouds >100Compression over Towns < 15

Average compression all over the world >50Nearly no visual degradation for 1m resolution images

Spin-offsQuality for 10 meters data anyhow excellent thanks to statistical surface averaginge-CORCE (10m)<=> SPOT


E-CORCE as a multilayerSpace-ground GRID for 2015 !

13 to 104 satellites, 28 km swath, 300 kgs, 80Mb/s, 40 to 100 Grid Nodes

No end user distribution and ,no central facility, no full mosaic creation, end product is logically distributed but never “physically”available=> Internet IP virtual products (eg: I-tune, I-tube or emule functionning)


Node is a computer

GRID=Networked Nodes & Middleware

Unified computer resources


Node is areceiving system and a computer

Receiving GRID=Networked Nodes & Middleware

Unified receiving/processing resources


Node is a receiving system and a computer

Satellite GRID=Networked Nodes & Middleware

Unified Satellite resources


Two GRID mangement principals for space data ingestion

1) Direct ingestion onto the GRIDNo on board BufferingCoverage=Antenna footprintEasy and simple, high reliabilityNot optimal with respect to Downlink bandwith

2) Indirect GRID ingestion=>Limited buferring to lower

Averaging variable compression output (VBR compression)

Day/nigh averagingEfficient data transmission Data does not anymore belongs to footprint =>>>>> Node to Node returned transmission by Web

Compressed output

Orbit time


IP

IP

IP

IP

IP

IP

IP

IP

Satellites are “seen” by the system as spaceconnected to WAG nodes. Each Node take care of:- data reception over its antenna footprint- Image decompression- calibration and local mosaic creation.

Information stay on site and accesible from any client as a “contributing IP”to the world-wide mosaic

IPs

E-CORCE seen as a SensorWeb managed by a WAG


IP Features)

- Satellite up/down link drastic simplification (TM/TC and Payload data stream may share the same IP link)- Satellites seen as “Flying servers” and full SW driven(kind of WebSensor sytem)- TM/TC operation trough internet with 120 satellites seen as remote PCs- On board and ground information handling by Software

- Autonomy of transmitted packet (each packet beeing tagged find its own way to the recipient node). No need for extra datation, manual screening, routing, dedicated storage and blind cataloguing (zero manned operation for data ingestion )

- Each of the Node in turn is an IP node able to stream its own local mosaic. Users are not aware neither on the physical location nor the IP distribution.

- Any of the WAG node is in charge of its local mosaic (may come to very interesting features on data utilization based on local use)

Header & Tag Data content


The Wide Area Grid NODE

Reception of compressed payload dataUplink of TM/TC commands=>(Space IP flow/protocol emulation)

Image decompresion (adaptative JPEG200Image correctionLocal Mosaic creationInteraction with other Node under WAG supervision=> Resulting data set seen as data stream serveur , WAG IP streaming protoocol

Distribution by peer to peer mechanism creating a full virtual metric Earth

Local mosaic

GeocodedPortal


■Overall computerized capacity brought by 5000 PCs (1000 in 2012) spreaded over 50 to 100 receiving and processing centers may generate on a daily basis the world-mosaic at 1 meter resolution

■Typically any of he WAG node will make use of 20 PCs to create its local mosaic.

E-CORCE Ground cellular processing requirementsl


Troughput performance of e-CORCE (weekly refreshment)

•13 satellites @ 60 Mb/s continuous (compressed averaged)

•40 receiving/processing nodes in a satellite WAG

•Local mosaic stay local (so no data transmission•Node to node just for mosaic ajustment (10%)=6 Mb/s•Indirect reception Node to Node (30%)=18 Mb/s

•Distribution to portals 1 earth mosaic a week +users individuals requests < 40Mb/s

•Requirement for Node Internet troughput <60 Mb/s

•In fact very low cost for data transmission


E-CORCE surprising consequences induced by the WAG

The whole of the Earth is continuouslys accessible= No programmation

The whole of the Earth is available as a "virtual Globe" = No more catalog

The whole system is "on line" = No new technical interface for distribution

The whole system is fully automated= "Amazon like" commercial platform

Storage will be performed by users (for historical use) not by e-CORCE since refreshed continuouly=> Fresh images are less expensives than old one ! Production cost below ¼ of today level enabling new applications to emerge


The system "brain" (Wide Aera Grid)

Virtual Earth distributed 1 meter dayly mosaic Accessible from portals

“Pro Market”

“Mass Market”

“Thematic Market”


Emulated E-CORCE, 1meter resolution


Zoom 1M Zoom 2,5M


Today 1 meter resolution over 90% of the Globe !


e-CORCE: Innovation is not only technical !

e-CORCE: Innovation is not only technical !

Space manufact

13->104 Sats

Mass portal operators

Classical thematic needs

Business unit$$$$

Production

Concepts & patents


Any question to e-CORCE team?

Documents

Application of WAG in e-CORCE programme Prepared by: [email protected] WGISS26, 23 rd Sept.2008, Boulder, Colorado