VieVS User Workshop

7 – 9 September, 2010

Vienna

VIE_SCHED

Jing SUN

VieVS User Workshop 2010 2

Part I : Background

Part II : Workflow

Part III : VLBI2010 simulations

Part IV : Next step

VieVS User Workshop 2010 3

Backgroud

What’s the purpose of a scheduling program ?

Scheduling Program

Station

prc file, snp file

DRUDG

FS

Correlator

skd fileskd file

log file

VieVS User Workshop 2010 4

Backgroud

Current scheduling program

sked : Goddard, ftp://gemini.gsfc.nasa.gov/pub/sked/

sched : NRAO, http://www.aoc.nrao.edu/software/sched/index.html

...

VieVS User Workshop 2010 5

Backgroud

VLBI2010 Project1 mm measurement accuracy on global baselines

continuous measurements for time series of station positions and EOP

turnaround time to initial geodetic results of less than 24 hrs.

VIE_SCHEDsmall fast-moving antennas

broadband frequency (2–14 GHz)

two or more antennas at a site

…

VieVS User Workshop 2010 6

Workflow

Input

Station

antenna.cat : antenna information catalog file

position.cat : station x,y,z locations catalog file

equip.cat : equipment IDs catalog file

mask.cat : horizon and coordinate masks catalog file

Source

source.cat : source positions file

flux.cat : source fluxes file

VieVS User Workshop 2010 7

Workflow

Read station info from cat files, Read source info from cat files

Calculate rise/set

Schedule subconfiguration

Output scheduling info

Calculate slewing time to the new source

Calculate scan lengths

Check source position at the end of the observation

Calculate start time of the observationloop

VieVS User Workshop 2010 8

Workflow

Output

skd file (sked/sched)

NGS file

sked2ngs

2010-01-04T12h 2010-01-05T00h 2010-01-05T12h

24 hours continuous observing

8 x 1 hour sessions

4 x 2 hour sessions

4 x 1 hour sessions 15926 obs

32446 obs

33208 obs

99370 obs

18 stations network

4 different 24 hour operating schedules

VLBI2010 simulations

VieVS User Workshop 2010 10

schedule Xp,Yp,UT1 (uas,uas,uas) from IGG

Xp,Yp,UT1 (uas,uas,uas) from GSFC

41 hour session [34 41 24] [28 19 15]42 hour session [27 28 16] [15 9 12]1 hour session [27 27 16] [18 10 11]24 hours continuous session

[10 12 6] [10 7 9]

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

me

an e

rror

[mm

]

North Component

0

1

2

3

4

5

rms

err

or

[mm

]

station index

FO

RT

LEZ

A

WA

RK

WO

RT

UR

UM

QI

AZ

OR

20

10

CN

AR

YIS

GG

AO

20

10

KO

KE

E

AR

EC

IBO

TS

UK

UB

32

KA

TH

12M

KO

RE

A

GO

LD

20

10

YA

RR

A1

2M

HA

RT

RA

O

YE

BE

201

0

WE

TZ

20

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NY

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ES

20

MT

PL

SN

T

VLBI2010 simulations

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

me

an e

rror

[mm

]

West Component

0

1

2

3

4

5

rms

err

or

[mm

]

station index

FO

RT

LEZ

A

WA

RK

WO

RT

UR

UM

QI

AZ

OR

20

10

CN

AR

YIS

GG

AO

20

10

KO

KE

E

AR

EC

IBO

TS

UK

UB

32

KA

TH

12M

KO

RE

A

GO

LD

20

10

YA

RR

A1

2M

HA

RT

RA

O

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BE

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20

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20

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PL

SN

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-5

0

5

me

an e

rror

[mm

]

Zenith Component

0

5

10

15

rms

err

or

[mm

]

station index

FO

RT

LEZ

A

WA

RK

WO

RT

UR

UM

QI

AZ

OR

20

10

CN

AR

YIS

GG

AO

20

10

KO

KE

E

AR

EC

IBO

TS

UK

UB

32

KA

TH

12M

KO

RE

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GO

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20

10

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A1

2M

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201

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20

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20

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PL

SN

T

schedule 3D RMS (mm) from IGG

3D RMS (mm) from GSFC

41 hour session 8.17 8.442 hour session 6.25 5.81 hour session 6.11 5.624 hours continuous session

3.30 3.3

VieVS User Workshop 2010 11

4*1 hour session from VIE_SCHED 4*1 hour session from SKEDnumber of scans 480 653number of sources 263 163number of obs 18383 159273D RMS (mm) 11.2 12.4

VLBI2010 simulations

0 50 100 150 200 250 300 350

-80

-60

-40

-20

0

20

40

60

80

Right ascension [deg]

Declina

tio

n [

deg

]

source distribution

0 50 100 150 200 250 300 350

-80

-60

-40

-20

0

20

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60

80

Right ascension [deg]

Declina

tio

n [

deg

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source distribution

0 5 10 15 200

500

1000

1500

2000

2500

station index

num

ber o

f o

bse

rvati

on

s

observations distribution

0 5 10 15 200

500

1000

1500

2000

2500

station index

num

ber o

f o

bse

rvati

on

s

observations distribution

0 2 4 6 8 10 12 14 16 189

9.5

10

10.5

11

11.5

12

12.5

13

station index

sky c

ove

rag

e v

alu

e

sky coverage distribution

0 2 4 6 8 10 12 14 16 189

9.5

10

10.5

11

11.5

12

12.5

13

station index

sky c

ove

rag

e v

alu

e

sky coverage distribution

Schedule from sked Schedule from VIE_SCHED

logical algorithm

optimization criteria

twin/multiple telescopes

interactive interface

Next step

VieVS User Workshop 2010 13

Thanks for your attention !