<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 22:40:00.000"
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, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.02.10 (041) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604102102240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.705" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.177" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="488.624" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="403.903" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="353.644" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.616" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.849" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.192" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.727" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
440.000 440.000 440.000 445.000 445.000 445.000 445.000 440.000 438.333 436.667 435.000 432.500 430.000 425.000 425.000 430.000 430.000 432.222 434.444 436.667 438.889 441.111 443.333 445.556 447.778 450.000 450.000 445.000 440.000 440.000 441.667 443.333 445.000 446.667 448.333 450.000 451.667 453.333 455.000 455.000 455.000 465.000 471.667 478.333 485.000 485.000 488.624 524.495
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 57 66 72 69 69 63 0 63 63 57 60 63 66 60 66 0 60 57 60 51 57 0 0 60 57 57 69 63 66 60 66 57 0 60 60 57 63 66 66 57 0 0 57 60 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="160">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.405 145.0 150.0 155.0 160.0 165.0 170.0 174.809 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.214 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 403.903 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.225 0.248 0.272 0.296 0.32 0.343 0.354 0.386 0.447 0.515 0.592 0.679 0.776 0.883 1.0 1.125 1.258 1.395 1.536 1.682 1.829 1.98 2.132 2.287 2.443 2.602 2.763 2.927 3.093 3.262 3.434 3.61 3.788 3.971 4.157 4.348 4.544 4.744 4.949 5.158 5.372 5.589 5.804 6.01 6.191 6.316 6.35 6.349 6.334 6.297 6.242 6.17 6.084 5.985 5.876 5.756 5.63 5.497 5.358 5.216 5.072 4.925 4.778 4.63 4.483 4.337 4.193 4.05 3.91 3.772 3.637 3.506 3.377 3.252 3.13 3.012 2.897 2.786 2.678 2.574 2.473 2.376 2.282 2.192 2.104 2.02 1.939 1.861 1.786 1.713 1.644 1.577 1.513 1.451 1.392 1.335 1.28 1.227 1.177 1.129 1.082 1.037 0.995 0.954 0.914 0.876 0.84 0.805 0.772 0.74 0.709 0.68 0.652 0.625 0.599 0.574 0.55 0.527 0.505 0.484 0.464 0.445 0.426 0.409 0.392 0.375 0.36 0.345 0.33 0.317 0.303 0.291 0.279 0.267 0.256 0.245 0.235 0.225 0.216 0.207

</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="6.35" PeakHeight="403.903" Num="5" zHalfNm="353.644" Error="3.636">
-173.14 -42.024 27.439 -11.265 2.301
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.214" Depth="0.154"/>
<TopsideChapman PeakHeight="403.903" PeakDensity="500279.16" PeakScaleHeight="36.727" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
