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GROUND SEGMENT · PASS QUALITY · ADVISORY ONLY

Jantar Ground: Pass Quality & Station Readiness

Scores each pass against its own link budget, checks a station is ready before the contact, and says whether a fault looks like the ground or the spacecraft. Jantar reads the station; it never drives it.

GROUND NETWORK ASSURANCE

From a Bad Pass to a Cited Explanation

A ground station with a readiness checklist; a satellite passing over a dish with a signal chart; a lens over a knowledge graph; three stations under one satellite, one of them marked in amber
Before the passReadinessA go or no-go for the operator. A check that cannot be measured reports unknown and forces no-go.
The passPass QualityMeasured signal quality against what the link budget gives for that geometry.
A degraded passCited InvestigationThe same investigation as a spacecraft anomaly: every claim cited, ungrounded steps held.
Several stationsGround or SpacecraftOne station degraded points at that station; every station degraded points at the spacecraft.
READ-ONLYEvery adapter reads and none writes: the SNMP path has a get and no set. It advises the operator and actuates nothing.
INTERFERENCELocates an interfering emitter from arrival times alone. A solve that does not converge returns no fix.
NOT YET A LIVE STATIONThe SNMP, MQTT and Kafka adapters are tested against simulated agents and brokers only.

Measured on Synthetic Reference Passes

The ground fault matrix injects faults into synthetic reference passes and includes nominal control passes. These are benchmark results on synthetic data, not results from a real station.

Detection precision (with controls)1.000
Detection recall (injected faults)1.000
Root-cause attribution (attributable classes)1.000
Citation integrity (faults run through the pipeline)1.000
Injected fault passes / nominal control passes11 / 2

Measured on synthetic · injected station passes, JANTAR-REF-1 graph. attributable=4 · false_positives=0. Source: make bench-ground. Measured at commit 2bc4474. From this release’s scorecard. Time to detect is not yet measured.

Advisory by Design

Jantar Ground ships at authority level A0: it proposes, a human authorises, and nothing in it commands a spacecraft or a station. A cross-station verdict says where to look first, never what failed.