Recent content by Micanopy Mike

Hello, All-- I see no posts have been made for a long time on this GOES GRB forum. What happened? Why did posting stop? I have a question.... My only interest in the GRB signal is to obtain the false color GeoColor imagery. In addition to the various infrared spectral imagery channels does...

Hi-- I am in N. Central Florida and looking for a 12-ft (or even 15-ft) dish to downlink the new GOES-EAST (75 deg W) met-sat. I would LOVE to have a dish like the one in this photo with a cassegrain (secondary reflector) feed that would provide for installing the L-Band (1686.6 MHz) feed...

RE: "Big Dish Locator" Thanks for posting that!! On another topic (SDRs for GRB downlinking), a friend is the director of a team of RF design engineers who are tasked with incorporating bleeding edge technology SDR designs for receiving and processing the RF emissions generated by the...

RE: Searching for a 12-ft or larger dish ****************** I have been searching for a used 12-ft dish for some months but with no luck. For my GOES-East GRB downlinking project I have found a number of abandoned 10-ft dishes but all were in pretty bad condition so I am currently stuck...

Hi-- You said: I think my next step will be to make a 3-turn helical coil tuned for 1686 and place it in a metal can wave guide. **************** I have never seen a helical inside any kind of waveguide but always mounted on a flat plate. The illumination angle of even a 3 or 4 turn helix...

**************** Hi-- Have you characterized your home-brew GRB septum feed with a vector network analyzer across a swept frequency spread of---say...: 1650 to 1750 MHz ? If so, can you provide a copy of the display screen capture of the Smith Chart and SWR ? I have never built a septum...

************************************************** Hi, Is your septum feed homebrew or commercially made (i.e. RF HamDesign ?) Have you characterized it for LH vs RH polarization isolation? If it is from RF HamDesign, their L-Band septum feed is spec'd for use with 0.40 to 0.45 f/D dishes...

Hi-- Regarding the Nooelec Sawbird+ LNA and integral bandpass filter....: N6BY said: Myself and several others are using an LNA / Saw filter combo unit made by Nooelec. Its called the SawBird+ and is specially designed for GOES GRB reception. It works very well. ***************** The Nooelec...

Some comments and observations: A) It appears that a cantenna feed (if PROPERLY configured) will work for receiving both polarities from the GRB signal. I say this as I have seen a commercial cantenna feed for an L-Band downlink at a NASA facility at the Cape that had 4-probes and two 90-deg...

********************************************* Hi-- I am wondering what results some of these several varietions of home-brew cantennas would show when looked at with a high-quality VNA (vector network analyzer). I have an Hewlett Packard 8714ES with several extra optional functions. I have...

Hi, All-- After looking through all of the posts regarding the tortuous path of multiple levels of trials and error finding the right combination of hardware to produce a clean, error free GRB data stream I took a look at the 2nd half of the quest: software to display all of the imagery...

Hi-- I know nothing about the NOAAPORT signal except that it is downlinked from the SES Americom SES-1 Satellite, Transponder 13C. The satellite is located at 101 degrees West Longitude. I just did a quickie cursory search for what products are carried on the NOAAPORT downlink but did not see...

************************* Hi, Fred-- I knew that the dipole feed is useless for the GRB downlink. I built it for downlinking the EMWIN signal and it seems to be producing sufficient signal above the noise-floor to enable clean processing and display of the EMWIN content. Several commercial...

************** Hi-- In response to your questions: 1) I have a couple of different feeds. The spectrum analyzer screen photos of the GRB and EMWIN RF signals I posted were made with a linear polarized feed. It is a home-brew copy of a commercial feed (by Seavy Engineering, Subsidiary of...