interconnection point physical flows

They are the metered quantities of gas moving across each point where transmission systems meet - cross-border links above all. The ENTSOG Transparency Platform record describes the family:

• per-interconnection-point physical flows, nominations, allocations, renominations and capacity
• coverage of hundreds of interconnection points across ~30 TSOs, multiple indicators, daily and hourly periods since 2007
• grain: per interconnection point, per direction, per gas day (or hour), per TSO
• an hourlyData parameter for optional hourly detail

Physical flow is the measured quantity; nominations and renominations are the declarations that surround it, published beside it in the same platform.

Border-point flows are where European gas security becomes visible: they show which routes are carrying gas, in which direction, hour by hour.

• Direction matters. Flows are reported per direction per point, so a pipeline serving both ways appears twice - collapsing directions erases reversals.
• Gas-day framing differs from calendar time. The reporting period is the gas day, not midnight-to-midnight, and mismatches show up as phantom gaps.
• TSO identity anchors joins. With ~30 TSOs reporting, per-TSO attribution is what lets you separate one operator's border point from another's.
• Hourly detail is opt-in. The hourlyData parameter exists because daily granularity is the default; pulling hourly for hundreds of points since 2007 is a volume decision.
• Flows need their declaration context. Physical flow without nominations and allocations cannot explain why a pipeline ran below capacity.

1. Confirm the point inventory. ENTSOG covers hundreds of interconnection points across ~30 TSOs; a source with a thin point list cannot answer route-level questions.

1. Check the declared grain. The record states per interconnection point, per direction, per gas day (or hour), per TSO - any coarser feed has already aggregated away something you may need.

1. Test the history depth. Coverage since 2007 supports pre-crisis baselines; shorter series cannot show structural shifts.

1. Exercise the hourlyData parameter. Verify hourly retrieval behaves within rate limits before building on it - see api query etiquette for shared-host courtesy.

1. Reconcile flow against nominations. Where measured flow diverges from nominated volumes, allocations explain the gap; a source carrying only one side halves the analysis.

Terms that frame border-point reporting: - gas day — A gas day is the standard 24-hour trading and reporting period used in European gas markets; GIE's AGSI+ and ALSI platforms timestamp every storage and LNG observation per gas day rather than... - nomination allocation renomination — The family of shipment-declaration indicators ENTSOG publishes next to measured physical flows at each interconnection point, alongside capacity split into technical, available and booked values. - transmission system operator tso — The company that operates a national or regional gas transmission network.