<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.02.11 (042) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604202112240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.726" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.903" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.864" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="414.051" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="374.907" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.616" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="60.163" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.836" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.337" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 371.667 373.333 375.000 376.667 378.333 380.000 380.000 380.000 375.000 380.000 385.000 380.000 375.000 376.667 378.333 380.000 380.000 382.500 385.000 387.500 390.000 390.000 390.000 395.000 397.500 400.000 400.000 395.000 395.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 411.176 412.353 413.529 414.706 415.882 417.059 418.235 419.412 420.588 421.765 422.941 424.118 425.294 426.471 427.647 428.824 430.000 430.000 430.000 432.000 434.000 436.000 438.000 440.000 440.000 440.000 440.000 440.000 440.000 442.000 444.000 446.000 448.000 450.000 452.000 454.000 456.000 458.000 460.000 455.000 456.250 490.000 490.002 490.005 490.008 490.011 490.015 490.020 490.026 490.033 490.042 490.054 490.070 490.092 490.127 490.189 490.323 490.864
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 60 0 0 57 0 69 60 0 60 69 57 0 0 69 63 63 0 0 72 60 66 66 54 63 66 66 63 57 0 63 63 66 57 57 63 57 57 66 69 66 69 72 66 66 66 63 0 63 54 63 60 66 69 69 66 0 0 0 69 0 0 0 60 0 63 66 69 0 0 66 66 0 0 60 0 0 0 0 0 0 72 57 0 66 0 66 66 57 72 66 72 0 69 0 69 75 72 72 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="146">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.416 145.0 150.0 155.0 160.0 165.0 170.0 174.832 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.248 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 414.051 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0
</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 0.406 0.487 0.564 0.64 0.718 0.797 0.879 0.964 1.052 1.144 1.24 1.34 1.445 1.554 1.668 1.787 1.911 2.04 2.176 2.317 2.465 2.62 2.782 2.951 3.128 3.313 3.508 3.711 3.925 4.149 4.385 4.632 4.893 5.167 5.455 5.758 6.073 6.398 6.721 7.019 7.236 7.3 7.299 7.272 7.209 7.114 6.992 6.847 6.683 6.504 6.314 6.114 5.908 5.698 5.486 5.274 5.062 4.854 4.648 4.447 4.251 4.06 3.874 3.695 3.522 3.355 3.195 3.041 2.893 2.751 2.616 2.487 2.363 2.245 2.132 2.025 1.923 1.826 1.733 1.645 1.561 1.481 1.406 1.334 1.265 1.2 1.139 1.08 1.024 0.972 0.922 0.874 0.829 0.786 0.746 0.707 0.67 0.636 0.603 0.572 0.542 0.514 0.487 0.462 0.438 0.416 0.394 0.374 0.354 0.336 0.318 0.302 0.286 0.271 0.257 0.244 0.231 0.219 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="7.3" PeakHeight="414.051" Num="5" zHalfNm="374.907" Error="3.397">
-167.529 -63.397 26.393 -2.917 0.647
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.248" Depth="0.154"/>
<TopsideChapman PeakHeight="414.051" PeakDensity="661166.25" PeakScaleHeight="29.337" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
