Please explain the purpose of operation: |
Since 2001, Deere has been equipping domestic agricultural equipment with its GreenStar precision farming system. The GreenStar system employs receive-only vehicle mounted StarFire mobile earth stations, which are currently licensed pursuant to IBFS File No. SES-LIC-20010112-00051. These antennas receive L-band signals from the Inmarsat geostationary satellite at 98 degrees west longitude, and provide correctional data which enhances the information the GreenStar system receives simultaneously from Global Positioning Satellites (GPS). This system enables the operators of domestic farming equipment to pinpoint their location to within twenty (20) centimeters (+ 1σ). This precise positioning capability developed originally to assist farmers in comparing the crop yields from various fields to determine, among other things, the amount of fertilizer and seed appropriate for a particular field and crop has now found additional important uses to improve farming efficiency. The GreenStar system now enables farmers to manually record observations such as weed patches, crop appearance, and other field variables with remarkable precision. Furthermore, when coupled to the vehicle steering system through the Deere AutoTrack system it aids the operator to steer a more precise path when making repeated passes over the same track thus greatly reducing crop and soil damage. The proposed testing will use the Inmarsat IIIF4 positioned at 142 degrees west longitude to aid Deere in evaluating routine modifications and improvements to the GreenStar system, which has now been in field operation for approximately five (5) years.
The planned testing is receive-only. The GreenStar terminals integrated into agricultural equipment are not equipped to transmit RF carriers. Furthermore, the proposed downlink transmissions for the above mentioned testing will be at 1535.15 MHz, within the same band currently authorized for the antennas in the GreenStar system under SES-LIC-20010112-00051. Please also note that the proposed modifications and improvements to the receive-only GreenStar system will affect software and hardware unrelated to the RF equipment, which will carry forward unaltered from the already licensed system. Thus, the grant of this STA poses no interference threat to other licensed occupants of the L-band or any other licensed band. |