Attachment I -ASOS Thunderstorm Sensor Specifications.pdf

Attachment I

ASOS THUNDERSTORM SENSOR SPECIFICATIONS

1. ASOS Thunderstorm Detection Requirements

1.1. General Requirements

[TSS-1] The Thunderstorm Sensor must be a commercial off-the-shelf (COTS) or non-developmental item (NDI) sensor with an IP66 rating for outdoor installation.

[TSS-2] Technical operations and maintenance must be supplied for the Thunderstorm Sensor in an editable electronic format with permission for the Government to use for training/maintenance purposes.

[TSS-3] The Thunderstorm Sensor must come with an installation kit containing ALL necessary power cables, data cables, hardware, and other ancillary items necessary for proper installation and operation.

[TSS-4] Surrounding Obstructions: The Thunderstorm Sensor must meet the siting requirement specified in FCM-S4-2019.

1.2. Self-Testing/Diagnostic Capability

The maintenance philosophy of the ASOS is to maximize the ability of today’s “smart” sensors to perform built-in tests capable of detecting and reporting internal anomalies and/or failures, which adversely affect reporting accuracy. The Government’s goal will be to procure a Thunderstorm sensor capable of identifying and fault-isolating all sensor-specific hardware and firmware anomalies.

[TSS-5] The Contractor must identify the extent to which their Thunderstorm Sensor can provide these capabilities and must provide an interface document which details all communication and message formats relevant to this capability.

[TSS-6] Off-line extended diagnostic procedures and tools must be provided for faults that cannot be detected by the self-testing/diagnostic capability. The off-line extended diagnostics are diagnostic procedures designed to be performed through external commands received via a maintenance technician laptop computer connected to the serial interface of the gauge. These diagnostic procedures may make use of extensive dialogue with the maintenance technician, and may use commonly available external test equipment and/or common hand tools if required.

1.3. Performance Requirements

1.3.1. Detection

[TSS-7] Cloud-to-Cloud, cloud-to-ground and intra cloud lightning discharges

1.3.2. Detection Efficiency

[TSS-8] 95% for single flashes within 19km (12mi)

1.3.3. Range

[TSS-9] The thunderstorm sensor shall detect 100% of thunderstorms within 19km (12mi) with 3 or more cloud-to-ground discharges.

[TSS-10] The thunderstorm sensor must have a minimum detection range of 25 Miles https://www.icams-portal.gov/resources/ofcm/fmh/siting/fcm-s4-2019.pdf

1.3.4. False Reporting

[TSS-11] The sensor must have no greater than a 5% false positive reporting within 19km (12 mi)

1.3.5. Range Resolution Uncertainty

[TSS-12] The thunderstorm sensor must have an average range resolution of +/- 500M from 0 to 25 mi.

1.3.6. Mean Bearing Accuracy

[TSS-13] +/- 15 degrees, 99% of the time

[TSS-14] +/- 1 compass octant, 99.9% of the time

[TSS-15] +/- 1 degree on test pulse

1.3.7. Bearing resolution

[TSS-16] 1 second increments, 0 to 360 degrees

1.4. Environmental Requirements

1.4.1. Temperature

[TSS-17] The TS Sensor must be able to maintain operations in temperatures up to 120o F.

[TSS-18] The TS Sensor must be able to recover operations from temperatures up to 130o F.

[TSS-19] The TS Sensor must be able to maintain operations in temperatures down to -40o F (-60oF preferred).

[TSS-20] The TS Sensor must be able to recover operations from temperatures down to -80o F.

[TSS-21] The TS Sensor must be able to maintain operations in temperature shock conditions dropping from 70o F to -40o F (-60o F preferred).

[TSS-22] The TS Sensor must be able to recover operations from temperature shock conditions dropping

70o F to -80o F.

[TSS-23] The TS Sensor must be able to maintain operations in temperature shock conditions increasing from 80o F to 120o F.

[TSS-24] The TS Sensor must be able to recover operations from temperature shock conditions increasing

80o F to 130o F.

1.4.2. Humidity

[TSS-25] When operating in ambient air temperature conditions less than or equal to 80oF, the TS Sensor must operate without performance degradation in ambient relative humidity conditions up to 100% RH.

[TSS-26] When operating in ambient air temperature conditions within the range of 81oF to 95oF, the TS

Sensor must operate without performance degradation in ambient relative humidity conditions up to 95%

RH.

1.4.3. Wind

[TSS-27] The TS Sensor must operate without performance degradation when exposed to one-minute sustained average wind speeds up to 43 knots.

[TSS-28] The TS Sensor must operate without performance degradation when exposed to one-second wind gusts up 62 knots.

1.4.4. Rain

[TSS-29] The TS Sensor must operate without performance degradation when exposed to rain falling at a rate of up to 3-inches per hour with up to 30-knot wind speed conditions.

[TSS-30] The TS Sensor must be able to recover operations from rain conditions of up to 5 inches per hour with 73-knot winds.

1.4.5. Freezing Rain

[TSS-31] The TS Sensor must be able to maintain operations in freezing rain conditions of ice accretion up to 0.5 inches per hour up to 1.0 inches with 20-knot winds.

1.4.6. Other Environmental Elements

[TSS-32] The TS Sensor must be able to maintain and recover operations from exposure to dust conditions up to 5.0 mg/ft3 with winds of 2.6 knot to 4.3 knots

[TSS-33] The TS Sensor must be able to maintain and recover operations from exposure to atmospheric pressures as low as 15.7 inches of Hg.

[TSS-34] The TS Sensor must be able to maintain and recover operations from exposure to the electromagnetic environment of a typical airport.

[TSS-35] The TS Sensor must be able to maintain and recover operations from exposure to salt fog characteristic of a typical marine environment.

1.5. Physical Interface Requirements

[TSS-36] The standard physical mounting interface is a vertical 3” galvanized pole approximately 8 feet above the ground.

[TSS-37] The TSS must physically interface with the standard ASOS pedestal using 316 or better stainless-steel bolts, washers, (lock washers), and lock-nuts. Additional mounting interface drawings are available upon request.

1.5.1. Interface Requirements

[TSS-38] The TS Sensor must be capable of interfacing with a datalogger.

[TSS-39] The TS Sensor must have a built-in asynchronous data interface mode capable of an SDI-12, RS-232 or RS-485 interface with user-selectable baud rate, parity, data bits, and stop bits.

1.5.2. Interrogation Rate

[TSS-40] The TS Sensor must have a configurable interrogation rate of at least ten seconds.

1.6. Power Requirements

[TSS-41] The TS Sensor must operate using a power supply that operates with either an input of 115 VAC

± 10%, 60 ± 5 Hz, single phase power OR DC power.

1.7. Logistics

[TSS-42] The TS Sensor must have a demonstrated hardware Mean Time Between Failure in excess of

10,000 hours (417 days).

1.8. Documentation

[TSS-43] Documentation shall provide storage, preparation, operation, calibration, maintenance and repair instructions (as applicable).

[TSS-44] Vendor shall provide an Illustrated Parts List (IPL) of all interior and exterior Thunderstorm components and hardware.

2. QUALITY ASSURANCE PROVISIONS

The TS Sensor must comply with this specification when installed in all environments defined in this specification. The Government may verify compliance with the requirements of this specification in general, and the following sub-paragraphs, using various testing methods. These methods may include field tests wherein the TS Sensor is exposed to outdoor environments and compared to a NWS standard, as well as possible rigorous laboratory testing wherein the TS Sensor will undergo exposure to an artificial environment specifically designed to demonstrate TS Sensor performance.

The Contractor must demonstrate, through a formal test and inspection program or from actual field use statistics that the TS Sensor and its components meet the functional, environmental, reliability, maintainability, and availability requirements specified herein to the greatest extent possible.

3. DELIVERY SCHEDULE

The vendor must coordinate with the government for the scheduled delivery of units post award to verify configuration to be delivered and enable the government to receive stock items contained in the field modification kit. An example of this would be placing an order, beginning to receive units at FOB destination within three (3) months of delivery order; with the remainder of the order to be delivered on a negotiated schedule that can be up to nine (9) months in the future. Vendors must invoice for partial deliveries so they can be paid for units delivered and accepted.

Vendors must state their full rate production capacity in relation to the order volumes in table 1-1 and under no circumstances will orders take more than one year to fulfill.

Table 1-1 Delivery Schedule

Anticipated

Sensor Total

Ordering

Year 1

Ordering

Year 2

Ordering

Year 3

Ordering

Year 4

Ordering

Year 5

150 10 50 35 30 25

4. WARRANTY

The warranty shall begin upon government acceptance at FOB destination. Units will be received, and processed into the Quality Control (QC) section at the National Reconditioning Center. Once cleared by

QC they will be entered into stock ready for issue. Clearing QC starts the warranty period and also provides the contracting officer’s representative the authorization to pay the invoice for units received.

The duration of the warranty shall be a minimum of two years from the date of acceptance. Vendors may propose extended warranties that will be optionally awarded based on the needs of the government.