RFQ_Questions_Amd 001.pdf
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- Multi-sensor hydrophone tags to be mounted on Hawaiian monk seals Federal contract opportunity
- Solicitation number
- 143071-24-0025
About this file
This document is a Request for Quotation (RFQ) for the purchase of multi-sensor hydrophone tags to be mounted on Hawaiian monk seals. The RFQ provides details on the technical requirements, delivery schedule, and evaluation criteria for the acquisition.
The government is seeking to purchase three multi-sensor hydrophone tags with specific data collection capabilities, including high-frequency accelerometer, GPS, video, depth, and hydrophone sensors. The tags must be capable of wireless charging and withstanding depths over 500 meters. Quotes are due by April 15, 2024, and the government intends to award a firm-fixed price purchase order to the responsible offeror submitting the lowest priced, technically acceptable quote. Delivery is required by March 15, 2025. The acquisition is open to all sources, with a NAICS code of 334515 and a small business size standard of 750 employees. The contract will be awarded on an all-or-none basis, with payment terms of Net 30.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| RFQ_SF18 Attachment_Amd 001.pdf | ||
| RFQ_SF18 Attachment.pdf | ||
| SAM Combined Synopsis_143071-24-0025.pdf |
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Text version
Multi-Sensor Hydrophone Tags
RFQ # 143071-24-0025
Amendment #01 – 4/11/2024 The purpose of this amendment is to extend the delivery date from 9/30/2024 to 3/15/2025 and to provide the following Questions and Answers:
Q&A:
1) What is the expected duration that the device will be deployed on a seal?
Answer: We expect the device to be deployed on a seal for no longer than two weeks.
2) How rigid is the wireless charging requirement? Enclosures that are rated for the required depth
(>500 meters) tend to be aluminum, which isn't compatible with a wireless charging requirement.
Assuming offloading the data from the device requires opening the device, could that time be used to charge the device with a wired connection, and therefore lose the wireless charging requirement?
Answer: We prefer a wireless charging tag so that there are no external ports that may leak during deployment.
3) What sampling rate do you require for the various sensors? A proposal:
Record when a threshold is crossed
- Accelerometer (interested in moments when velocity changes, not when velocity is constant)
- GPS (only enable/record GPS data when device is at surface (ie seal is on a beach), since GPS won't work deep underwater)
- Video / Audio: triggered by depth / time / light
- Record every minute:
- Accelerometer
- Pressure
- Gyroscope
- Magnetometer
- Temperature
- Light
Answer: The triaxial accelerometer should be capable of recording at 400 Hz, but have options to decrease the sampling rate (e.g., 200 Hz, 100 Hz). The accelerometer must be able to record continuously.
The GPS should record when the seal is at the surface of the water and while hauled-out.
The video camera should be capable of being triggered at a specified depth, time, and/or light intensity value. The sampling rate for the video camera should have multiple options such as recording for 30 minutes every three hours, for one hour every 5 hours, or continuously.
Record every minute:
- Accelerometer: 400 Hz
- Pressure: 10 Hz
- Gyroscope: 50 Hz
- Magnetometer: 50 Hz
- Temperature: 1 Hz
- Light: 1 Hz
- Hydrophone: 48 kHz
4) How should video and audio (hydrophone) recording be linked?
- One-to-one: video and audio are always recorded simultaneously
- Disjoint: video and audio recording are independent
- Video can be recorded without audio, and audio can be recorded without video
- Video superset of audio: video can be recorded without audio, but not vice-versa
- Audio superset of video: audio can be recorded without video, but not vice-versa
Answer: We expect that the hydrophone will record continuously, whereas the video will record at a specified sampling rate to maximize battery life and storage capacity. Timestamps on the video and audio data are heavily preferred to align video with audio and IMU data.
5) Do you expect a light source?
- Proposal 1: only record when depth is near enough to the surface to have decent lighting
- Proposal 2: add a light source, which will be enabled when recording video below a certain depth
- Note that light source will reduce battery life
Answer: We do not expect a light source on the tag. However, a light intensity sensor is required.
6) What is the tolerable level of clock drift for timestamping the recorded data?
- Typical quartz clocks drift by <1 minute per month
- Is it acceptable that the timestamps of the recorded data diverge from the ground truth time by as much as ~1 minute per month deployed?
- In theory the system clock could be periodically corrected using the GPS sensor.
- Adds complexity, may not be worth it depending on requirements
Answer: We expect that clock drift may not be an issue due to the brief recording duration of the tag.
File details come from the government source that posted it. Updated .