# Is the nds.gwosc.org server down?
**URL:** https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184
**Category:** Data Analysis
**Created:** [February 28, 2025, 10:47am UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184 "2025-02-28T10:47:01Z")
**Posts on this page:** 20
**Page:** 2
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [August 19, 2025, 4:18pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/23 "2025-08-19T16:18:21Z")
Thank you for the update and the support. Looking forward to it.
---
### Author:  [@martinberoiz](https://ask.igwn.org/u/martinberoiz)
#### Post date: [August 19, 2025, 6:57pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/24 "2025-08-19T18:57:48Z")
Try now, it should be up and running again.
---
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [August 20, 2025, 1:20am UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/25 "2025-08-20T01:20:46Z")
Thank you so much, indeed it is working.
---
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 7, 2025, 2:00pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/26 "2025-09-07T14:00:53Z")
Hello, unfortunately it seems to have stopped again.
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### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 13, 2025, 2:52pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/27 "2025-09-13T14:52:18Z")
Hi, the server seems to be down again. Thank you for the continued support.
---
### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [September 15, 2025, 3:03pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/28 "2025-09-15T15:03:34Z")
Thanks for letting us know. The NDS2 server seems to be working now. Please let us know if you continue to experience problems. You can also try OSDF to see if that’s more reliable.
[https://gwosc.org/osdf/](https://gwosc.org/osdf/)
---
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 15, 2025, 3:21pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/29 "2025-09-15T15:21:42Z")
Thank you, I’ll check it out. Also, I’m fetching aux files and not sure if it was updated but last time I tried OSDF does not support fetching those.
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### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [September 15, 2025, 3:24pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/30 "2025-09-15T15:24:17Z")
@Shan909 That’s strange. The aux data should be on OSDF. If you are not able to find it there, please let me know, and I will take a look. It would help me if you can give me a specific example of what channel and times you are trying to find.
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### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 15, 2025, 3:34pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/31 "2025-09-15T15:34:45Z")
I think the issue is aux data is only on nds, not sure.
Added the code in attachment but it’s simply osdf in a user friendly wrapper.
Here the channel is L1:ASC-X\_TR\_A\_NSUM\_OUT\_DQ
time segments:
start,end
1256663958,1256673192
1256673691,1256756709
1256766682,1256772748
1256775368,1256798949
[https://github.com/Shantanu-Parmar/Ligolearner909/blob/41a171dd8ababa84b8f1228dab4ce4c4e411e196/osdf\_demo.py](https://github.com/Shantanu-Parmar/Ligolearner909/blob/41a171dd8ababa84b8f1228dab4ce4c4e411e196/osdf_demo.py)
---
### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [September 15, 2025, 5:23pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/32 "2025-09-15T17:23:23Z")
@Shan909 The aux data are available on OSDF. Here is an example command that finds a data file:
```auto
$ gw_data_find -r datafind.gwosc.org -o L -t L1_AUX_AR1 --latest -u osdf
osdf:///gwdata/O4a/AUX/AUX_AR1/L1/L-L1_AUX_AR1-13894/L-L1_AUX_AR1-1389428288-63.gwf
```
In python, this seems to work:
```auto
>>> import os
>>> import requests_pelican as rp
>>> from gwdatafind import find_urls
>>> url = find_urls( "L", "L1_AUX_AR1", 1256663958, 1256673192, urltype='osdf', host="https://datafind.gwosc.org")
>>> print(url)
```
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### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 15, 2025, 5:50pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/33 "2025-09-15T17:50:29Z")
So, I tried it using 04 data you mentioned and it works well although I am not sure which auxillary file AUX\_AR1 is never saw the name before.
However, for the older runs (03) it still does not work
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### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [September 15, 2025, 5:58pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/34 "2025-09-15T17:58:52Z")
The frame type is documented on the docs page:
> **[O4 Auxiliary Channel Data Release](https://gwosc.org/O4/auxiliary/)**
>
> Gravitational Wave Open Science Center
```auto
This data release has frame type AUX_AR1 and is available via OSDF allowing to select and download the data. To launch large dataset jobs on a computing cluster one can use HTCondor .
```
Access for O3 aux data are documented here:
> **[O3 Auxiliary Channel Data Release](https://gwosc.org/O3/auxiliary/)**
>
> Gravitational Wave Open Science Center
Some sample python code is included on the page:
```auto
import os
import requests_pelican as rp
from gwdatafind import find_urls
url = find_urls( "H", "H1_AUX_AR1 ", 1240559616, 1240559626, urltype='osdf', host="https://datafind.gwosc.org")
with open(os.path.basename(url[0]), mode="wb") as file:
file.write(rp.get(url[0]).content)
```
---
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 15, 2025, 6:51pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/35 "2025-09-15T18:51:59Z")
Hmm…so through OSDF I first need to find channels from frame types and then fetch it.
I’ll try that one soon but if you are involved in the development process, wouldn’t it be more simpler to have a channel name tab also as a optional parameter to run like the nds approach. Just a suggestion and thanks for the redirect. I did not know about the OSDF working for aux channels come to think of it maybe I didn’t see it on the webpage earlier either. Is this a new feature?
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### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [September 15, 2025, 8:06pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/36 "2025-09-15T20:06:42Z")
I’m sorry, OSDF is not developed in-house. You can read more about the team that supports it and offer suggestions to them at the link below. We did recently update our [GWOSC documentation](https://gwosc.org/osdf/) regarding how to access GW data via OSDF, so it makes sense that this seems new. I would welcome any suggestions you can offer for how to make the documentation more clear and easy to use.
> **[Open Science Data Federation](https://osg-htc.org/services/osdf)**
>
> A national, distributed computing partnership for data-intensive research
---
### Author:  [@Shan909](https://ask.igwn.org/u/Shan909)
#### Post date: [September 16, 2025, 5:25pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/37 "2025-09-16T17:25:50Z")
Ah go it. I am going to add osdf support now to my GWeasy app too. Thanks for all the information, hopefully OSDF won’t trip off as much as nds.
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### Author:  [@alfadog67](https://ask.igwn.org/u/alfadog67)
#### Post date: [March 21, 2026, 9:48pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/38 "2026-03-21T21:48:06Z")
Hello, I’m experiencing a down server today. I did a port scan and all server ports are showing offline. It has been said that here is where I should post to get a server restart, if that’s possible.
Many thanks!
D. J.
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### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [March 23, 2026, 11:42pm UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/39 "2026-03-23T23:42:03Z")
Hi @alfadog67 . Thank you for letting us know.
I tried to get some data from `nds.gwosc.org` and it didn’t work. So there does seem to be an issue. I wasn’t able to fix it myself, so I will ask our admin team to look into it.
---
### Author:  [@jonah](https://ask.igwn.org/u/jonah)
#### Post date: [March 24, 2026, 2:22am UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/40 "2026-03-24T02:22:52Z")
This seems to be working now. Thank you @alfadog67 . Please let us know if you continue to have problems.
---
### Author:  [@alfadog67](https://ask.igwn.org/u/alfadog67)
#### Post date: [March 24, 2026, 5:19am UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/41 "2026-03-24T05:19:33Z")
Outstanding!! Thank you for your efforts!
---
### Author:  [@yoel](https://ask.igwn.org/u/yoel)
#### Post date: [June 23, 2026, 11:06am UTC](https://ask.igwn.org/t/is-the-nds-gwosc-org-server-down/1184/42 "2026-06-23T11:06:55Z")
@jonah I am trying to load auxiliary channel data from the datafinder dependancy but the link seems to not work. Are the servers down?
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