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liberfa/erfa
Thread safety of UTC/TAI conversions

Hello! Although in #27 it is stated that erfa is thread-safe, I think that UTC/TAI conversions currently are not, due to the way leap second tables are managed. In order to support access to and modification ...
  • bluescarni
  • 1
  • Opened 
    on Jan 7
  • #103

liberfa/erfa
Question on tai to utc conversion

In eraTaiutc, there is an iteration block that calls back to eraUtctai to get the leap seconds deltas. In the iteration, the deltas for both arguments are added to the 2nd argument. Should the first delta ...
  • timweckx
  • 1
  • Opened 
    on Oct 13, 2023
  • #99

liberfa/erfa
Check version number consistency on updates

When we moved to meson for building by default, we updated the release instructions to change version numbers in meson.build. But we still also have to make changes in configure.ac, since that way of building ...
  • mhvk
  • Opened 
    on Oct 13, 2023
  • #98

liberfa/erfa
Need to update to SOFA 19

SOFA 19 was released 2023 Oct 11.
  • mhvk
  • 2
  • Opened 
    on Oct 12, 2023
  • #96

liberfa/erfa
Single-precision floating-point level rounding errors when using pmsafe

We were having problems testing the Rubin Science Pipelines PM implementation with astropy/erfa and we traced it down to what we believe are floating-point errors in erfa. The simplest repro that I have ...
  • erykoff
  • 44
  • Opened 
    on Apr 26, 2023
  • #95

liberfa/erfa
proposal: use integer times internally

As I understand it, erfa s time routines currently represent time as a pair of double-precision floating point numbers. The first is the day part, and the second is a fractional sub-day part, of a Julian ...
  • spenczar
  • 8
  • Opened 
    on Mar 19, 2023
  • #93

liberfa/erfa
d2dtf(), dtf2d(), utctai(), dat(): Inexact table and method of detecting jump

The pre-1972 _changes are approximated to $10^{-7}\kern{3 mu}\text{s}$, leading to strange results. Example (After #91 fixed) from astropy.time import Time, TimeDelta t = Time( 1971-12-31 23:59:60.107757999 ...
  • mrhso
  • 13
  • Opened 
    on Feb 15, 2023
  • #92

liberfa/erfa
Wrong result from d2dtf() in pre-1972 UTC

Related: #76 #82 #76 was fixed in SOFA 17a, however, it has brought another problem. leap = (fabs(dleap) 0.5); The threshold is 0.5 s, which means that mini-leaps, of which the maximum absolute ...
  • mrhso
  • Opened 
    on Feb 11, 2023
  • #91

liberfa/erfa
why use fmod in calculating Fundamental arguments in eraNut80?

According to Vallado s book (Fundamentals of Astrodynamics and Applications, 4th Ed.), the Fundamental arguments can be calculated using equation 3-82 (page 225). image In this equation, the second item ...
  • AlfredXiaSF
  • Opened 
    on Apr 16, 2022
  • #89

liberfa/erfa
Auto-update zenodo

@eteq - I see that on zenodo this is still at 1.4. Would be good to auto-update it! Unfortunately, I think you ll have to adjust the settings for that...
  • mhvk
  • 1
  • Opened 
    on Feb 10, 2022
  • #88
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