APMSS DASHBOARD REFRESH
2026-06-26 20:37:07 UTC
APMSS RF VHF/UHF ENHANCEMENT WATCH
Non-F2 propagation watch: Es, tropo, ducting, scatter and specialist higher-band opportunities
VHF/UHF WATCH
Story bridge:
MUF and live activity panels answer the HF question. This panel answers the next question:
are VHF/UHF bands showing enough non-F2 support to justify monitoring, verification or specialist action?
Operator read
HF story is already handled by MUF and WSPR/RBN panels. This panel checks whether non-F2 mechanisms justify watching VHF/UHF. 5 band group(s) are watch-level, 0 are model-only, and 1 are not confirmed. Do not promote VHF/UHF without mechanism-specific confirmation.
| Band |
Likely mechanism |
Evidence read |
State |
Operator action |
| 6m |
Sporadic-E / scatter / weak VHF activity |
WSPR 190, RBN 1, route UK -> Europe, score 57.2 |
VHF WATCH |
Monitor only. Do not treat as F2 MUF support. Verify with Es, beacon, spot or local path evidence. |
| 4m |
Sporadic-E / regional VHF |
TROPO WATCH |
NOT CONFIRMED |
Needs direct 70 MHz spot/beacon evidence before promotion. |
| 2m |
Tropospheric ducting / refractivity / scatter |
Model/evidence text contains enhancement or ducting indicators. |
TROPO WATCH |
Possible enhancement watch. Verify with beacon, path report, aircraft scatter/tropo evidence or local operator confirmation. |
| 70cm |
Tropospheric ducting / refractivity / scatter |
Model/evidence text contains enhancement or ducting indicators. |
TROPO WATCH |
Possible enhancement watch. Verify with beacon, path report, aircraft scatter/tropo evidence or local operator confirmation. |
| 23cm |
Tropospheric ducting / refractivity / scatter |
Model/evidence text contains enhancement or ducting indicators. |
TROPO WATCH |
Possible enhancement watch. Verify with beacon, path report, aircraft scatter/tropo evidence or local operator confirmation. Microwave bands are specialist/ducting-sensitive. |
| 13cm |
Tropospheric ducting / refractivity / scatter |
Model/evidence text contains enhancement or ducting indicators. |
TROPO WATCH |
Possible enhancement watch. Verify with beacon, path report, aircraft scatter/tropo evidence or local operator confirmation. Microwave bands are specialist/ducting-sensitive. |
Interpretation discipline
VHF/UHF is not promoted from F2 MUF. 6m needs Es/scatter or live confirmation. 2m and above need tropo, ducting, beacon, aircraft scatter, auroral or local path confirmation.
Model-only means watch, not operational reliance.