Drill 2 - Baseline Check
Sweep Sheet
Section titled “Sweep Sheet”Date: Thursday 29 April, 0530 UTC Station: GW-01 Galway - NATS Europe Operator: You Site Lead: Charlie Brooks (on the phone from 0600)
Pre-pass sweep, every shift, before the first pass: live configuration against the recorded baseline, unit by unit; audit log since the last sweep; access request for each pass confirmed. Anything that differs from the baseline has a ticket behind it or it is drift. Drift is restored, flagged, and referred.
- Sweep procedure, revised 26 April
Recorded Baseline - GW-01 (daybook, 26 April)
Section titled “Recorded Baseline - GW-01 (daybook, 26 April)”| Unit | Setting | Value |
|---|---|---|
| RX modem 1 | Frequency | 1,414 MHz (MERIDIAN-SAR-1 video IF) |
| RX modem 1 | Bandwidth | 36 MHz |
| RX modem 1 | Modulation / FEC | QPSK 3/4 |
| LNB | LO | 13,100 MHz |
| GPSDO | Reference | GNSS-disciplined, PPS on |
| TX modem 1 | Frequency | 1,405 MHz |
| BUC | State | Muted |
Change Control
Section titled “Change Control”| Change | Who may make it | Ticket |
|---|---|---|
| Receiver / transmitter frequency | Operator on duty, site lead | Required, with the pass or incident it serves |
| LNB / BUC parameters | Site lead | Required |
| Vendor maintenance | Vendor account, in a maintenance window, escorted or on a recorded session | Required, and the window must be open |
The vendor maintenance account (svc-vendor) is for ACU and modem service. It is not authorised to retune a receiver, and there is no maintenance window this week.
Access Request - 0610 Pass
Section titled “Access Request - 0610 Pass”| Field | Value |
|---|---|
| Request | SAR-2027-0429-011 |
| Station | GW-01 |
| Spacecraft | MERIDIAN-SAR-1 (61701) |
| Window | 06:08 - 06:17 UTC |
| Frequencies | Per the plan (1,414 MHz RX IF; no transmit) |
| Confirmed by | Rotterdam constellation ops, 28 April 17:40 UTC, in the contact schedule |
The board shows what we plan to do. The request is what we are allowed to do. Confirm the request against the schedule, for today, before anything is keyed.
Sweep Checklist
Section titled “Sweep Checklist”- Baseline read from the daybook, not from memory
- RX modem 1 read on RX Analysis against the baseline
- Audit log since the last sweep reviewed
- Any difference: called as change (ticketed) or drift (not)
- Drift restored from the baseline
- Entries flagged; account held if the change was unauthorised
- Access request confirmed for each pass
- Sweep logged with times; referred to Group Security if anything was found