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Fix handling of Galileo alert page

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This commit is contained in:
Carles Fernandez
2026-07-19 00:51:16 +02:00
parent 091452251d
commit 4ca75aaa6e
1 changed files with 8 additions and 4 deletions
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src/core/system_parameters/galileo_inav_message.cc
+8 -4
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@@ -151,6 +151,8 @@ void Galileo_Inav_Message::split_page(std::string page_string, int32_t flag_even
{
const std::string page_INAV_even = page_Even;
const std::string page_INAV = page_INAV_even + page_Odd; // Join pages: Even + Odd = INAV page
const bool nominal_inav_page = page_INAV[GALILEO_INAV_EVEN_PAGE_TYPE_BIT] == '0' &&
page_INAV[GALILEO_INAV_ODD_PAGE_TYPE_BIT] == '0';
const std::string Data_k = page_INAV.substr(2, 112);
const std::string Data_j = page_INAV.substr(116, 16);
@@ -177,15 +179,17 @@ void Galileo_Inav_Message::split_page(std::string page_string, int32_t flag_even
if (CRC_test(TLM_word_for_CRC_bits, checksum.to_ulong()) == true)
{
flag_CRC_test = true;
// CRC correct: Decode word
// Alert pages contain reserved data and must not enter the nominal word decoder.
const std::string Data_jk_ephemeris = Data_k + Data_j;
const int32_t word_type = page_jk_decoder(Data_jk_ephemeris.c_str());
int32_t word_type = GALILEO_INAV_DUMMY_WORD_TYPE;
if (nominal_inav_page)
{
word_type = page_jk_decoder(Data_jk_ephemeris.c_str());
}
const std::bitset<8> hkroot_bs(osnma_sis.substr(0, 8));
const std::bitset<32> mack_bs(osnma_sis.substr(8, 32));
const bool osnma_sis_available = hkroot_bs.any() || mack_bs.any();
const bool nominal_inav_page = page_INAV[GALILEO_INAV_EVEN_PAGE_TYPE_BIT] == '0' &&
page_INAV[GALILEO_INAV_ODD_PAGE_TYPE_BIT] == '0';
const bool admit_osnma_page = nominal_inav_page &&
word_type != GALILEO_INAV_DUMMY_WORD_TYPE &&
osnma_sis_available;