<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 01:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.26 (026) 01:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602601260100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.468" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.746" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.159" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.711" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.089" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="41.552" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.215" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.377" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="41.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.030" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="33">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 330.000 332.500 335.000 331.667 328.333 325.000 340.000 340.000 345.000 340.000 335.000 325.000 322.500 320.000 320.000 319.167 318.333 317.500 316.667 315.833 315.000 314.167 313.333 312.500 311.667 310.833 310.000 320.000 325.000 349.137 388.753 465.771
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 51 54 48 60 48 51 51 48 51 54 0 57 54 0 0 0 0 0 0 57 60 0 0 54 54 54 51 54 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.953125 0.390625 1.171875 1.171875 1.953125 1.953125 1.171875 1.953125 -2.734375 -2.734375 -1.953125 -2.734375 1.953125 1.953125 1.953125 -1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.171875 -1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="105">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.472 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.943 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.415 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.159 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.367 0.501 0.698 0.966 1.307 1.718 2.195 2.731 3.321 3.954 4.617 5.293 5.958 6.581 7.13 7.569 7.865 7.995 8.0 7.976 7.878 7.718 7.507 7.256 6.977 6.678 6.366 6.048 5.729 5.413 5.103 4.801 4.51 4.23 3.963 3.709 3.468 3.24 3.024 2.822 2.632 2.453 2.286 2.129 1.983 1.846 1.718 1.599 1.488 1.384 1.287 1.197 1.114 1.036 0.963 0.896 0.833 0.774 0.72 0.669 0.622 0.578 0.538 0.5 0.465 0.432 0.402 0.373 0.347 0.323 0.3 0.279 0.259 0.241 0.224 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.0" PeakHeight="306.159" Num="5" zHalfNm="277.711" Error="2.63">
-85.988 -0.941 1.003 -0.753 -0.065
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.415" Depth="0.154"/>
<TopsideChapman PeakHeight="306.159" PeakDensity="794044.7" PeakScaleHeight="21.377" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
