Questions_and_Answers_-1.pdf

Question and Answer #1 7 March 2019

Q1. In reviewing subject Synopsis/Solicitation I noted on a number of occasions the use of the words “Shall be capable” and/or “shall allow” in 7 separate instances of Specifications/Salient Characteristics in lieu of “shall include”, or “shall provide” which are used elsewhere.

For example; In Spec #1 (below) the wording states “The system shall be capable of providing simulated GNSS RF signals via two independently controllable, composite outputs.” However, while it does not specifically state a need for this, your CLIN table CLIN 0001 clearly indicates a requirement for 2 RF output which supports the need vs. a capability. Additionally, in the second sentence of the same specification it is stated that each RF output “shall allow” use of 1 channel of GPS L1 to support SBAS. This wording does not clearly indicate if the SBAS feature (an option) is required of a responsive offer.

Please provide a clarification for each of the specifications that use the “shall be capable” or “shall allow” wording to clearly show the requirement as a need vs. a capability and that it shall be included or shall be provided in a technically responsive offer.

1. The system shall be capable of providing simulated GNSS RF signals via two independently controllable, composite outputs. Each independent RF output shall provide 16 channels of GPS L1 and 16 channels of GPS L2. Each RF output shall allow use of one channel of GPS L1 to support SBAS.

7. The system shall be capable of supporting an end-to-end 1kHz update rate from vehicle dynamics source (i.e. 6DOF model, simulator state vector, etc.) to RF output.

8. The system shall provide performance with Phase noise less than 0.005 Rad RMS, 0.1dB RF Signal Level resolution over a 60dB range, 0.3mm RMS Pseudorange accuracy, resolution of 0.1dB, Linearity of less than .1 dB from 20dB to -30dB. The system shall be capable of simulating dynamics represented in the RF signal output of 120,000 m/s relative velocity, 192,600 m/s2 relative acceleration, 890,400 m/s3 relative jerk

9. The system shall be capable of simulating RF interference sources including CW, swept CW, stepped CW, pulsed CW, AM and FM waveforms from 0.5 to 2GHz with no greater than +/- 1.0dB RSS of interference accuracy error between an I/S of 63-136dB and +/- 1.6dB RSS of interference accuracy error between an I/S of -1-16dB.

10. The system shall be capable of generating simulated inertial sensor data and supplying it to an inertial measurement unit using SimINERTIAL packages (already owned by the customer).

12. The system shall be capable of simulating multipath reflections, terrain obscuration, antenna reception gain patters, differential corrections, trajectory generation for land, air, sea and space vehicles and comprehensive system error modelling.

Q2. All references to “shall be capable” and “shall allow” are defined as “shall provide” or “shall include”. The terminology “shall” is defined as must be provided and is a requirement needed now. No options. All items are required listed on salient characteristics are a need.