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EVN Disk-Shipping Logistics (JIVE  Stations). Quick review of Disk-pack flows Disk receipt evolution Shipment of Packs per station/session Shipment costs (reported by stations) Tactics Options.

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Evn disk shipping logistics jive stations
EVN Disk-Shipping Logistics(JIVE  Stations)

  • Quick review of Disk-pack flows

  • Disk receipt evolution

  • Shipment of Packs per station/session

  • Shipment costs (reported by stations)

  • Tactics Options

EVN TOG Dec.2009, Effelsberg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (12/iv/09)


Evn vlba disk pack flux
EVN / VLBA disk-pack flux

EVN stations

session+2

session

for correlation

JIVE

pre-position

Bonn

NRAO


Pre session timeliness
Pre-session Timeliness

  • Needs:

    • Block schedule (& an end to revisions….)

    • Station on-hand & planned

  • Load calculation algorithms

    • Per target corrleator

    • Recording duty-cycle = 1

    • Pack size -:= 0.09 TB

  • Schemes to accelerate (session+2) rule

  • Avoidance of distributing bad packs





Evn disk shipping logistics jive stations

Shipment Costs per Sta/Sess (in euro)

Avg: On,Ys,Mh ~ 25-35 per pack

Tr ~35-50 per pack (Tr costs include VAT)

Sh,Ur,Hh ~ 40-100 per pack (Sh,Hh not including customs)


Tactics options
Tactics Options

  • Stations pay both ways (CURRENT)

    • adv: no cost to JIVE (built into base budget)

    • disadv: more expensive (netto); stations must find cooperative shipper; different rules from geodesy; no centralized ledger of costs

  • JIVE pays outgoing, bills stations

    • adv: cheaper; fewer possibilities for delay; more immediate feedback about costs

    • disadv: ASTRON FZ does not want to support this; JIVE sees negative cash-flow

  • Sender pays each way (akin to geodesy)

    • adv: same as above; no billing stations required

    • disadv: how does JIVE come out even; not all EVN stations are JIVE partners