<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 06:20:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.02.05 (036) 06:20:00</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">
FF202603602050620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.650" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.276" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="464.917" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="412.776" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="337.217" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.600" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="108.684" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.282" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.071" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.35 7.4 7.45 7.5 7.55 7.6 7.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 333.750 332.500 331.250 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 335.000 337.500 340.000 340.000 340.000 340.000 342.500 345.000 347.500 350.000 352.500 355.000 362.500 370.000 365.000 375.000 365.000 350.000 345.000 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 375.000 381.667 388.333 395.000 415.000 420.000 420.400 420.800 421.200 421.600 422.000 422.400 422.800 423.200 423.600 424.000 424.400 424.800 425.200 425.600 426.000 426.400 426.800 427.200 427.600 428.000 428.400 428.800 429.200 429.600 430.000 430.000 435.000 435.000 440.000 443.768 448.026 452.875 458.447 464.917 472.521 481.587 492.581 506.189 523.472 546.149 577.213 622.374 694.043
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 69 78 69 78 78 75 78 75 75 66 78 63 63 72 75 72 0 60 0 0 0 48 0 54 54 57 57 0 54 66 51 69 0 0 0 69 0 0 0 69 0 72 69 69 69 54 0 0 51 57 60 66 0 63 54 54 60 57 0 0 57 0 57 60 54 54 57 57 0 54 0 60 51 54 57 72 72 72 66 63 66 57 63 57 57 60 0 45 0 0 0 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -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 -2.734375 -2.734375 -1.953125 -0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -2.734375 -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 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.171875 1.171875 -2.734375 1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625 -2.734375 -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 2.734375 -1.171875 -0.390625 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.429 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.858 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.287 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 412.776 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.288 0.253 0.205 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.24 0.261 0.283 0.305 0.327 0.348 0.354 0.407 0.481 0.559 0.644 0.737 0.84 0.954 1.081 1.223 1.381 1.559 1.756 1.975 2.215 2.477 2.76 3.059 3.372 3.694 4.02 4.346 4.667 4.979 5.28 5.567 5.839 6.093 6.329 6.547 6.746 6.925 7.084 7.224 7.344 7.444 7.525 7.585 7.626 7.647 7.65 7.649 7.638 7.617 7.586 7.546 7.497 7.44 7.376 7.305 7.228 7.146 7.058 6.966 6.87 6.77 6.667 6.562 6.454 6.345 6.233 6.121 6.008 5.894 5.78 5.665 5.551 5.437 5.323 5.21 5.098 4.987 4.877 4.767 4.66 4.553 4.448 4.345 4.243 4.142 4.043 3.946 3.851 3.757 3.665 3.575 3.487 3.4 3.315 3.232 3.151 3.071 2.993 2.917 2.843 2.77 2.699 2.629 2.561 2.495 2.43 2.367 2.305 2.245 2.186 2.129 2.073 2.019 1.965 1.914 1.863 1.814 1.766 1.719 1.674 1.629 1.586 1.544 1.503 1.463 1.424 1.386 1.349 1.313 1.278 1.243 1.21 1.178 1.146 1.116 1.086 1.056 1.028 1.001 0.974 0.948 0.922 0.897 0.873 0.85 0.827 0.805 0.783 0.762 0.741 0.721 0.702 0.683 0.665 0.647 0.629 0.612 0.596 0.58 0.564 0.549 0.534 0.52 0.506

</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="7.65" PeakHeight="412.776" Num="5" zHalfNm="337.217" Error="3.914">
-209.369 19.757 -10.685 3.829 -0.021
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.287" Depth="0.154"/>
<TopsideChapman PeakHeight="412.776" PeakDensity="726085.6" PeakScaleHeight="57.071" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
