Changeset 11042 in ntrip for trunk/BNC/src/bnchelp.html
- Timestamp:
- Sep 22, 2026, 5:19:12 PM (13 days ago)
- File:
-
- 1 edited
-
trunk/BNC/src/bnchelp.html (modified) (6 diffs)
Legend:
- Unmodified
- Added
- Removed
-
trunk/BNC/src/bnchelp.html
r11027 r11042 4615 4615 <ol type="1"> 4616 4616 <li>Special character '>' is the first character in each 'Epoch Record' (as we have it in RINEX Version 3)</li> 4617 <li>SSR message or topic descriptor, valid descriptors are:<br>ORBIT, CLOCK, CODE_BIAS, PHASE_BIAS, or VTEC</li>4617 <li>SSR message or topic descriptor, valid descriptors are:<br>ORBIT, CLOCK, CODE_BIAS, PHASE_BIAS, VTEC, META_DATA, or SAT_ANTENNA</li> 4618 4618 <li>Year, GPS time</li> 4619 4619 <li>Month, GPS time</li> … … 4652 4652 <pre><p style="font-family:Monospace"> 4653 4653 > ORBIT 2022 10 01 23 59 45.0 2 110 SSRA00CNE1 4654 2 4654 4655 G01 93 -0.1588 -0.8664 -0.0600 0.2210 -0.1200 -0.0400 4655 4656 G02 33 0.0491 -1.7468 0.5608 0.1820 0.0040 0.0200 … … 4672 4673 <p></pre> 4673 4674 4675 <p> 4676 The second record in this block provides one parameter, an SSR source format indicator: 4677 <ul> 4678 <li>SSR source format indicator<br> 4679 0 − unknown<br> 4680 1 − (old) RTCM-SSR / IGS-SSR<br> 4681 2 − (new) RTCM-SSR 4682 </li> 4683 </ul> 4684 This indicator determines which relativistic correction formula applies when the orbit correction is combined 4685 with the Broadcast Ephemeris: the velocity-based formula of IS-GPS-200D 20.3.3.3.3.1 for the (new) RTCM-SSR 4686 format, or the classic eccentricity-based formula otherwise. 4687 </p> 4674 4688 Records in this block provide the following satellite specific information: 4675 4689 <ul> … … 4763 4777 <pre><p style="font-family:Monospace"> 4764 4778 > PHASE_BIAS 2022 10 01 23 59 45.0 2 110 SSRA00CNE1 4765 0 1 4779 2 0 1 4766 4780 G01 157.50000000 0.00000000 3 1C -0.6023 1 2 7 2W -0.8679 1 2 7 5I -0.8614 1 2 7 4767 4781 G02 13.35937500 0.00000000 2 1C 0.7878 1 2 4 2W 1.1236 1 2 4 … … 4783 4797 </p></pre> 4784 4798 <p> 4785 The second record in this block provides the following consistency information: 4799 The second record in this block starts with the same SSR source format indicator used in the 'ORBIT' block 4800 (0 = unknown, 1 = (old) RTCM-SSR / IGS-SSR, 2 = (new) RTCM-SSR), followed by two more numbers whose meaning 4801 depends on it, since RTCM-SSR and IGS-SSR/(old) RTCM-SSR define different phase bias parameters here: 4786 4802 <ul> 4787 4803 4788 <li>Dispersive bias consistency indicatory<br> 4789 0 − phase biases valid for non-dispersive signal only<br> 4790 1 − phase biases maintain consistency between non-dispersive and all original dispersive phase signals 4791 </li> 4792 4793 <li>MW consistency indicator<br> 4794 0 − code and phase biases are independently derived<br> 4795 1 − consistency between code and phase biases is maintained for the MW combinations 4796 </li> 4804 <li>SSR source format indicator = 2, i.e. (new) RTCM-SSR:</li> 4805 <ul> 4806 <li>Satellite Yaw Information indicator<br> 4807 0 − yaw angle/rate not provided (both fields below are zero)<br> 4808 1 − yaw angle/rate provided 4809 </li> 4810 <li>Extended Phase Bias Property ID − a satellite-specific property ID (0-15) used to correlate a 4811 later Extended Phase Bias message's wide-lane information back onto this satellite's signals</li> 4812 </ul> 4813 4814 <li>SSR source format indicator = 0 or 1, i.e. unknown or (old) RTCM-SSR/IGS-SSR:</li> 4815 <ul> 4816 <li>Dispersive Bias Consistency indicator<br> 4817 0 − phase biases valid for non-dispersive signal only<br> 4818 1 − phase biases maintain consistency between non-dispersive and all original dispersive phase 4819 signals 4820 </li> 4821 <li>MW Consistency indicator<br> 4822 0 − code and phase biases are independently derived<br> 4823 1 − consistency between code and phase biases is maintained for the MW combinations 4824 </li> 4825 </ul> 4797 4826 4798 4827 </ul> … … 4858 4887 <li>Spherical harmonic coefficients C and S, sorted by degree and order (0 to maximum)</li> 4859 4888 </ul> 4889 </p> 4890 4891 <p> 4892 <b>Example for block 'META_DATA' carrying model/correction metadata</b> 4893 </p> 4894 <pre><p style="font-family:Monospace"> 4895 > META_DATA 2026 06 26 09 00 15.0 0 3 SSRA00BKG0 4896 2 260 3 4897 3 1 0 0 0 0 4898 6 1 0 0 0 0 4899 7 1 0 0 0 0 4900 </p></pre> 4901 <p> 4902 The second record in this block provides three parameters: 4903 <ul> 4904 <li>SSR IOD</li> 4905 <li>SSR Provider ID</li> 4906 <li>SSR Solution ID</li> 4907 </ul> 4908 Following records, one per model/correction entry, provide: 4909 <ul> 4910 <li>Model/correction type indicator<br> 4911 1 − satellite antenna Phase Center Variations (PCV)<br> 4912 2 − satellite antenna Group Delay Variations (GDV)<br> 4913 3 − solid earth tides<br> 4914 4 − ocean loading<br> 4915 5 − pole tides<br> 4916 6 − relativity<br> 4917 7 − GNSS broadcast ephemeris reference 4918 </li> 4919 <li>Application indicator (whether the model/correction is applied on the provider's side)</li> 4920 <li>Non-default model indicator</li> 4921 <li>Non-default model identifier (only valid if the non-default model indicator is set)</li> 4922 <li>Data IOD indicator</li> 4923 <li>Data IOD (only valid if the Data IOD indicator is set) − for type 1 or 2, this confirms the 4924 Satellite Antenna IOD of a 'SAT_ANTENNA' block below, see there</li> 4925 </ul> 4926 </p> 4927 4928 <p> 4929 <b>Example for block 'SAT_ANTENNA' carrying satellite antenna corrections</b> 4930 </p> 4931 <pre><p style="font-family:Monospace"> 4932 > SAT_ANTENNA 2026 06 26 09 00 15.0 0 16 SSRA00BKG0 4933 G08 260 23 1 0 1 16 7 2 G1 0 0.0000 0.0000 -0.0020 -0.0030 -0.0050 -0.0060 -0.0070 -0.0090 -0.0100 -0.0100 -0.0100 -0.0100 -0.0080 -0.0060 -0.0030 0.0000 0.0060 0.0120 G2 0 0.0000 0.0000 -0.0020 -0.0030 -0.0050 -0.0060 -0.0070 -0.0090 -0.0100 -0.0100 -0.0100 -0.0100 -0.0080 -0.0060 -0.0030 0.0000 0.0060 0.0120 4934 G16 260 23 1 0 1 16 7 2 G1 0 0.0000 0.0000 0.0010 0.0030 0.0050 0.0070 0.0100 0.0110 0.0110 0.0100 0.0090 0.0070 0.0050 0.0040 0.0040 0.0050 0.0050 0.0080 G2 0 0.0000 0.0000 0.0010 0.0030 0.0050 0.0070 0.0100 0.0110 0.0110 0.0100 0.0090 0.0070 0.0050 0.0040 0.0040 0.0050 0.0050 0.0080 4935 .. 4936 </p></pre> 4937 <p> 4938 Records in this block provide the following satellite specific information: 4939 <ul> 4940 <li>GNSS Indicator and Satellite Vehicle Pseudo Random Number</li> 4941 <li>SSR Provider ID</li> 4942 <li>Satellite Antenna IOD − unique per Provider ID within a rolling 64-day period, see note below</li> 4943 <li>Phase Center Information indicator − corrections apply to phaserange observations</li> 4944 <li>Group Delay Information indicator − corrections apply to pseudorange observations</li> 4945 <li>Nadir Angle Dependent Correction indicator</li> 4946 <li>Maximum off-nadir angle [deg] (only meaningful if the previous indicator is set)</li> 4947 <li>Nadir angle dependent correction range extension (extra bit width for the correction values below)</li> 4948 <li>Number of frequencies, succeeded by frequency specific information:</li> 4949 <ul> 4950 <li>Frequency label (e.g. G1, G2, G5, R1, R2, E1, E5, E6, E7, E8, J1, J2, J5, J6, C1, C2, C5, C6, C7)</li> 4951 <li>Nadir correction indicator</li> 4952 <li>Nadir correction [m] − offset between the orbit antenna reference point and the frequency 4953 reference point along the satellite's nadir direction; zero if the indicator above is not set</li> 4954 <li>Nadir angle dependent correction [m], one value per 1-degree bin from 0 up to the maximum 4955 off-nadir angle above (only present if the Nadir Angle Dependent Correction indicator is set)</li> 4956 <li>Frequency label, ...</li> 4957 <li>etc.</li> 4958 </ul> 4959 </ul> 4960 </p> 4961 <p> 4962 Whether a given correction is a Phase Center Variation (PCV, applies to phaserange observations only), a 4963 Group Delay Variation (GDV, applies to pseudorange observations only), or both at once (same values applied to 4964 each observation type independently) is determined by the Phase Center Information and Group Delay Information 4965 indicators, not by the type of value itself. 4966 </p> 4967 <p> 4968 Before BNC's PPP client applies a satellite's antenna correction, it must be confirmed via a 'META_DATA' block: 4969 the Satellite Antenna IOD must be non-zero and must match the Data IOD of a Metadata entry of type 1 (PCV) or 4970 type 2 (GDV) − either is sufficient, since Metadata carries this IOD once globally while the Satellite 4971 Antenna IOD is GNSS-specific, so the same Metadata entries serve as the trust anchor for every GNSS. In 4972 addition, since a Satellite Antenna IOD is only guaranteed unique within a rolling 64-day period, BNC discards 4973 any Satellite Antenna correction that is 64 days or older, even if its IOD would otherwise still match, and 4974 falls back to using ANTEX-based satellite antenna corrections instead. 4860 4975 </p> 4861 4976
Note:
See TracChangeset
for help on using the changeset viewer.
