dear Jeff, Putting a photogrammetric system on the Landsat NEXT would be great! My first choice would also be a triplet sensor, but I can imagine DEMs might be a niche application, in respect to other application domains. Hence, it might be fruitfull to look at (or propose) an alternative design, which is similar to HRG that was on the SPOT5 system. This dual array system had a front and backwards looking system, and was offset by half a pixel. Consequently, it could generate DEMs or "super pixel" resolution, in this case the resolution was increased from 5 to 2.5 meter. Hence, for Landsat NEXT a similar concept might work as a compromise, as some applications (or regions of the world) might be more interested in a higher resolution panchromatic band, and not so much a DEM time-series. Or the modes can alternate, and every odd pass (2*repeat cycle) a global DEM (with clouds) is constructed. Best, Bas ________________________________________ From: GLIMS <glims-bounces@nsidc.org> on behalf of glims-request@nsidc.org <glims-request@nsidc.org> Sent: 16 November 2020 23:23 To: glims@nsidc.org Subject: GLIMS Digest, Vol 92, Issue 1 Send GLIMS mailing list submissions to glims@nsidc.org To subscribe or unsubscribe via the World Wide Web, visit https://nsidc.org/mailman/listinfo/glims or, via email, send a message with subject or body 'help' to glims-request@nsidc.org You can reach the person managing the list at glims-owner@nsidc.org When replying, please edit your Subject line so it is more specific than "Re: Contents of GLIMS digest..." Today's Topics: 1. Landsat NEXT (Landsat 10) recommendations (Jeffrey Kargel) ---------------------------------------------------------------------- Message: 1 Date: Mon, 16 Nov 2020 17:06:29 +0000 From: Jeffrey Kargel <jeffreyskargel@hotmail.com> To: GLIMS Mailing List <glims@nsidc.org> Subject: [GLIMS] Landsat NEXT (Landsat 10) recommendations Message-ID: <MN2PR02MB68322A870F30BED6A48FA9EFCBE30@MN2PR02MB6832.namprd02.prod.outlook.com> Content-Type: text/plain; charset="iso-8859-1" Dear GLIMS people: I hope you are safe and healthy, or if you have fallen ill with COVID that your recovery is full. And for the present predicament of more lockdowns, I wish you sanity and contentment as we await better days! I am happy to say that our earlier recommended addition of two sensor bands (what I called GLIMS1 and GLIMS2) has been adopted in the still-evolving Landsat 10 design. They are called bands 13a and 13b. See the attached Landsat NEXT sensor specifications document. I have responded to a recent NASA Request for Information (other attached document), where I am pushing for a good stereo imaging band at least the equal of ASTER's and hopefully better. I included in it some guidance I think from Ted Scambos, where we both agreed that 60 degrees was way too much, because we would mainly be seeing hazes, and it is overkill for parallax. The RFI included some words about a possible multiplatform structure, which would make sense to aid stereo imaging that way. So I really didn't have much guidance to offer, aside from that important matter. It seems that it will be an amazing satellite/camera/sensor setup, maybe not that vast of an improvement over the super-amazing Sentinel-2, but an improvement over that and also Landsat 8 (and 9 coming up next year). For those of you who responded to me during last June's flurry of activity on this, thank you very much. Now, let's try to get good stereo imaging! Cheers, Jeff Kargel