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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
slide7

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
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