NPR Distribution manages the Public Radio Satellite System (PRSS), and provides satellite transmission services to regional public radio networks and commercial broadcasters across the United States.
Our ServicesEnables networks to send programming to stations without incurring head-end costs.
NPR Distribution works in partnership with producers, distributors and broadcast stations to provide interconnection for the entire public radio system. Consistent delivery of best-in-class technology, process, business practice, and 24-hour customer service in an ever-evolving environment ultimately serves the audiences of public radio.
A solar or sun transit outage is an electromagnetic phenomenon that causes a station downlink to be temporarily unable to receive a satellite signal due to interference from the sun as it passes behind the satellite.
Solar outages occur on a predictable schedule and affect downlinks in the U.S. for about five consecutive days, for as many as six minutes a day, twice each year. To obtain solar outage information for your location, click on your state in the drop-down menu below. * All times ET
The following rules apply to all solar outages:
The dates listed on this site are those for which the solar disk will be within the beam pattern of your receive antenna and are given for the center of the state in most cases. On these days you will see a definite reduction in performance as the sun passes. All stations will see a reduction of Eb/No readings on the digital audio channels. If a downlink has enough margin, there will be no effect on the audio. If the downlink does not have enough margin, audio may be lost for up to several minutes. Stations with marginal downlinks may see some degradation one day before or one day after the dates listed.
The dates and times listed are for the peak of the interference. Depending on the size of your antenna, the interference may begin up to four minutes before this time and last up to four minutes after it. The interference will be longer on days in the center of the range. There will also be dates, both before and after peak interference predictions, where you will experience noticeable reduction of Eb/No readings.
The times are given in NPR network time, which is Eastern time. These predictions are based on a 365-day year. The variations from year to year are so small that separate predictions for each year are not necessary.
To tune your satellite antenna to receive NPR Distribution C-Band and Ku-Band transmissions from Intelsat’s Galaxy 16, you need two pieces of information:
Elevation: The angle of the satellite (0 to 90 degrees) above true horizontal relative to the location you select.
Azimuth: The compass direction, relative to magnetic north.
The transition from standard time to daylight-saving time (DST) occurred at 02:00:00 ET on Sunday, March 9, 2025.
The transition from daylight-saving time (DST) to standard time will occur at 02:00:00 ET on Sunday, November 2, 2025.
Please read the technical and operational notes below about handling the transitions to and from daylight saving time. If you require additional assistance, please submit a ticket on our Help Center or give us a call at 800.971.7677.
The following are technical and operational notes about handling fall and spring time changes.
Each DST-ST or ST-DST transition has two components:
DST and Your Local Computers
ContentDepot operates in coordinated universal time or UTC, which is an absolute standard that does not adjust for DST or "summer time." Likewise, ContentDepot delivers UTC data via Network Time Protocol (NTP) on the satellite streams. Any time zone or DST offsets are applied at end devices - typically production computers or time-of-day displays synchronized via NTP.
Spring Time Change
The ContentDepot transition to DST is very straightforward:
Operational Considerations
The ContentDepot headend will transmit stream setup data and commands for the 03:00:00 ET hour at the end of the 01:00:00 ET hour. We recommend you review your station schedule for the data of the time change to verify your local programming flow from 01:59:00 ET to 03:00:00 ET. In ContentDepot, the 02:00:00 ET hour on the day of the time change does not exist and will not execute. The system will operationally step from 01:59:59 ET to 03:00:00 ET.
The only operational function in your ContentDepot file storage receivers affected by DST offset is the automated deletion of files based on their kill dates. The SFX 4104 receivers still operate on the "old" DST transition dates, but deleting files an hour later for three weeks won't make any difference in local operation. Displays and log entries will be incorrect for three weeks, but that's easily remedied, if desired, by hand-setting the time zone an hour "ahead" at a convenient time. There is no operational effect of any DST change in your stream decoders - they always function in UTC.
Fall Time Change
The ContentDepot transition to standard time is very straightforward:
Operational Considerations
If you use ContentDepot stream programs overnight on Saturdays (including early Sunday morning):
If you play ContentDepot file programs overnight, check your program's portal page. In some cases, the producer has generated a special "extra" hour of their program and uploaded it into the "evergreen" slot. Watch for messages from your program producer(s) for more information.
Also, please be aware that your station may receive a Receiver Conflict Report for 1:00 AM on the morning of the time change. These conflicts are intentional and do not require any action on your part. They are the result of the reversion to standard time. The PRSS NOC has made several special, repeat bookings for the hour of 1:00 AM to account for the time change. The result, however, is your station may receive a Receiver Conflict Report.
What Else Do You Need to Do?
The most important action you can take is make sure that your local production systems (including time-of-day displays) have the latest updates so that they'll properly step back (fall) or forward (spring). You should also check with your automation/playback system vendor to see if there are any special scheduling considerations for your particular installation.
If you require additional assistance, submit a ticket to the Distribution Help Desk for support.