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I am not sure if others have been able to get the Sentinel-2 GCS Pub/Sub subscription (projects/gcp-public-data---sentinel-2/topics/gcp-public-data-sentinel-2) to work in their applications/workflows, but every time I initialize a subscription for this bucket I am unable to receive any messages (note the blue line 1 in the graph, which is consistent with other graphs of subscriptions I've made in the past). Does anyone have any suggestions for receiving notifications that a new image has been uploaded to the S2 GCS bucket?

bj_SkyTruth15
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  • Could you clarify where the topic `projects/gcp-public-data---sentinel-2/topics/gcp-public-data-sentinel-2` comes from? Is this a publicly available topic that has GCS notifications attached or did you create the topic and add notifications to it as described in https://cloud.google.com/storage/docs/reporting-changes#prereqs? – Samarth Singal Sep 22 '21 at 21:50
  • Hi! This is a public topic, provided to me by a Google Developer. – bj_SkyTruth15 Sep 23 '21 at 13:03
  • Can you point me to some documentation for it? – Samarth Singal Sep 23 '21 at 22:34
  • That's the weird thing; when I attempt to look it up, I can't find any reference to it. Here is what was said in the original email correspondence I received from the Google Developer: "We update the BigQuery (I had initially asked a question about BigQuery) tables daily with metadata, but you can also subscribe to the Pub/Sub topic for the data stored in GCS: projects/gcp-public-data---sentinel-2/topics/gcp-public-data-sentinel-2" While this one doesn't produce any results, a similar pub/sub topic works for Landsat (included below). – bj_SkyTruth15 Sep 24 '21 at 13:04
  • "projects/gcp-public-data---landsat/topics/gcp-public-data-landsat" – bj_SkyTruth15 Sep 24 '21 at 13:07
  • I see, I would reach out to this developer and if needed, ask them to contact Cloud Pub/Sub dev team internally. Perhaps there is an issue with Sentinel2 subscription and they're just not aware of it. – Samarth Singal Sep 24 '21 at 17:20
  • Thank you Samarth, I appreciate your help. – bj_SkyTruth15 Sep 27 '21 at 12:43
  • I reached out to a Google Developer and the subscription is now working; there was an issue with the sub on their end. How do I close this question? – bj_SkyTruth15 Oct 02 '21 at 06:25

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