Extending band math to Sentinel fails

[arunasank]

Hi, I am a researcher who's using Sentinel. I am trying to repurpose https://github.com/planetlabs/notebooks/blob/master/jupyter-notebooks/orders/tools_and_toolchains.ipynb for sentinel data. I am trying to retrieve teh NDSI value using bands 3 and 11 from Sentinel's analytic bundle

{
	"name": "band math",
	"products": [{
		"item_ids": ["S2B_MSIL1C_20200614T205029_N0209_R057_T09WWV_20200614T225007"],
		"item_type": "Sentinel2L1C",
		"product_bundle": "analytic"
	}],
	"tools": [{
		"bandmath": {
			"b1": "b3",
			"b2": "b11",
			"b3": "(b3 - b11) / (b3 + b11)"
		}
	}]
}

This is the request I send the bandmath API and it fails, with this response:

<Response [202]>
3c2e604b-6c13-4a6c-958e-0c3f00194fb8
queued
running
running
running
running
running
running
running
running
running
running
running
running
running
failed

---------------------------------------------------------------------------

Exception                                 Traceback (most recent call last)

<ipython-input-104-39ad275fa5ba> in <module>()
      1 if run_bandmath:
      2     bandmath_order_url = place_order(bandmath_request, auth)
----> 3     poll_for_success(bandmath_order_url, auth)
      4     downloaded_bandmath_files = download_order(bandmath_order_url, auth)
      5     # bandmath_img_file = next(downloaded_bandmath_files[d] for d in downloaded_bandmath_files

<ipython-input-98-6cbe379ad2ad> in poll_for_success(order_url, auth, num_loops)
     22         success_states = ['success', 'partial']
     23         if state == 'failed':
---> 24             raise Exception(response)
     25         elif state in success_states:
     26             break

Exception: {'_links': {'_self': 'https://api.planet.com/compute/ops/orders/v2/3c2e604b-6c13-4a6c-958e-0c3f00194fb8'}, 'created_on': '2020-09-07T05:19:32.520Z', 'error_hints': ['An error occured during operation execution. (code: FAILURE_CODE_INVALID_INPUT Bandmath_v1)'], 'id': '3c2e604b-6c13-4a6c-958e-0c3f00194fb8', 'last_message': 'All assets have failed processing', 'last_modified': '2020-09-07T05:21:55.385Z', 'name': 'band math', 'products': [{'item_ids': ['S2B_MSIL1C_20200614T205029_N0209_R057_T09WWV_20200614T225007'], 'item_type': 'Sentinel2L1C', 'product_bundle': 'analytic'}], 'state': 'failed', 'tools': [{'bandmath': {'b1': 'b3', 'b2': 'b11', 'b3': '(b3 - b11) / (b3 + b11)'}}]}

I am not sure how to debug this. Can someone help?