New Prediction System - New Prediction System - IntroductionIntroduction

The Consolidated Prediction Format (CPF) The Consolidated Prediction Format (CPF) provides a single, convenient method for provides a single, convenient method for most stations to range to disparate targetsmost stations to range to disparate targets

It can also accommodate cross-technique It can also accommodate cross-technique ranging attempts to allow more observations ranging attempts to allow more observations of a greater number of targetsof a greater number of targets

Advantages over TIVs for SLRAdvantages over TIVs for SLR

Features of the CPFFeatures of the CPF Does not assume Euclidian spaceDoes not assume Euclidian space Tabular ephemeris, with a time spacing Tabular ephemeris, with a time spacing

appropriate to each target – and no tuning!appropriate to each target – and no tuning! Multiple record types allow tailoring the Multiple record types allow tailoring the

prediction file to particular target types – prediction file to particular target types – satellites, moon, transponderssatellites, moon, transponders

Reference frame is ITRFReference frame is ITRF Drag, time bias, and manoeuvres can be Drag, time bias, and manoeuvres can be

built into CPF filesbuilt into CPF files

New Prediction System - AgendaNew Prediction System - Agenda1) What is the status of CPF generation and 1) What is the status of CPF generation and distribution?distribution?

- NSGF- NSGF - UT/CSR - UT/CSR

- HTSI- HTSI - AIUB- AIUB

2) What is the status of CPF station implementation?2) What is the status of CPF station implementation?

- MLRS- MLRS - Zimmerwald- Zimmerwald

- NSGF- NSGF - HTSI (MOB/Ts/S2K)- HTSI (MOB/Ts/S2K)

- Mt. Stromlo- Mt. Stromlo

3) Are the acquisition and normalpoint results adequate?

4) What (unexpected) challenges have the CPFs posed?

5) Are the prediction point separations adequate?

6) Are the prediction file sizes acceptable?

New Prediction System – Agenda (II)New Prediction System – Agenda (II)

To answer these questions: R. Ricklefs UT/CSR G. Appleby NSGF W. Gurtner AIUB B. Clarke HTSI J. Luck EOS

7) What is the status of lunar and transponder predictions? - LRO – J McGarry

8) What is the status of sample software and documentation?8) What is the status of sample software and documentation? R. RicklefsR. Ricklefs W. GurtnerW. Gurtner

9) What is the time table be for network implementation? R. Ricklefs

UT CPF PredictionsUT CPF Predictions

ICESat predictions have been available in ICESat predictions have been available in CPF since March and have been used at CPF since March and have been used at MLRS and ZimmerwaldMLRS and Zimmerwald

Lunar predictions are available on our ftp Lunar predictions are available on our ftp sitesite

MLRS CPF StatusMLRS CPF Status

Tracking using CPF for artificial satellites for Tracking using CPF for artificial satellites for at least some of the passes since March at least some of the passes since March 2005.2005.

About 300 passes with new systemAbout 300 passes with new system 55% LEO, 40% MEO, 5% HEO55% LEO, 40% MEO, 5% HEO NSGF, HTSI, and UTX CPF predictions NSGF, HTSI, and UTX CPF predictions

usedused

DocumentationDocumentation

Working DocumentWorking Document Being revised and improvedBeing revised and improved

Targeted Documents (“Read Me First”)Targeted Documents (“Read Me First”) For prediction centersFor prediction centers For stationsFor stations

Sample Code - ISample Code - I

Read and interpolation routines with test Read and interpolation routines with test program: FORTRAN and c.program: FORTRAN and c.

CPF_INTER – Satellite predictions with CPF_INTER – Satellite predictions with look-ahead and look-back: FORTRANlook-ahead and look-back: FORTRAN

PREDICT (and test program): Lunar and PREDICT (and test program): Lunar and transponder predictions with light-time transponder predictions with light-time iterations: FORTRANiterations: FORTRAN

Sample Code - IISample Code - II

cpf_chk – checks format of cpf file: ccpf_chk – checks format of cpf file: c cpf_split (and suite) – Break multi-day cpf cpf_split (and suite) – Break multi-day cpf

into pass files at specific station. Also into pass files at specific station. Also produces a schedule document: Mainly produces a schedule document: Mainly FORTRAN with 1 c program in suiteFORTRAN with 1 c program in suite

Timetable for implementationTimetable for implementation

15 November 2005:15 November 2005: Predictions available on CDDIS and EDCPredictions available on CDDIS and EDC Sample code and targeted documentation Sample code and targeted documentation

on CDDIS on CDDIS

31 December 2005:31 December 2005: Predictions available from all centersPredictions available from all centers

30 June 200630 June 2006 All stations using new predictionsAll stations using new predictions