Specifications

Reception of the GOES Rebroadcast (GRB) data is accomplished by means of a fixed dish antenna with a dual left and right hand circular feed horn connected to two Low Noise Amplifiers. The Low Noise Amplifiers outputs are connected to Radio Frequency/ Intermediate Frequency down-converters which are connected to Digital Video Broadcasting-S2 (DVB-S2) capable receivers. The GRB downlink signal from the satellite is at a center frequency of 1686.600 MHz and requires an Antenna gain-to-noise-temperature (G/T) of 15.2 dB/K for worst-case locations. Modulation is either:

• 8PSK with a symbol rate of 7.825768 Million symbols per second (Msps) with a rate 2/3 Forward Error Correction coding
• QPSK with a symbol rate of 8.665938 Million symbols per second (Msps) with a rate 9/10 Forward Error Correction coding

The GOES-16 default modulation mode is QPSK.

Nominal antenna size: 4.5 meter dish with a system noise temperature of 120 degrees K. The Link Budget is available here. A dual circular polarization is used to accommodate the 31 Mbps data rate

Click here for the product allocation on Right Hand Circular Polarized (RHCP) and Left Hand Circular Polarized (LHCP).

The GOES-R series GRB Downlink Specifications are available on the GOES-R Documents page.

View GRB Link Budget PDF >>>