<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 22:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.02.09 (040) 22:00:00</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">
FF202604002092200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.215" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.713" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="0.414" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="492.958" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="390.118" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.831" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.917" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.733" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 370.000 370.000 370.000 371.429 372.857 374.286 375.714 377.143 378.571 380.000 380.000 380.000 385.000 386.250 387.500 388.750 390.000 390.833 391.667 392.500 393.333 394.167 395.000 397.000 399.000 401.000 403.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 432.500 435.000 435.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 457.000 459.000 461.000 463.000 465.000 467.500 470.000 472.500 475.000 475.000 480.000 485.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 512.500 515.000 517.500 520.000 525.000 530.000 532.500 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 585.000 590.000 595.000 600.000 610.000 615.000 625.000 630.000 640.000 645.000 655.000 660.000 670.000 679.737 690.659 702.997 717.045 733.186
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 0 60 0 0 60 0 0 0 57 0 54 48 0 0 0 48 0 54 0 57 0 63 0 0 0 0 54 0 0 60 54 0 60 51 54 0 48 54 57 60 54 57 57 57 57 0 54 57 57 0 0 54 60 48 60 63 54 0 51 0 0 57 0 0 0 57 63 0 45 57 45 57 60 57 60 60 60 60 57 60 0 0 0 60 57 60 0 60 60 57 57 57 57 57 54 57 60 60 60 57 60 60 57 57 60 57 60 57 54 57 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -2.734375 -1.953125 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 1.171875 -1.171875 2.734375 -1.171875 1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.171875
</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" >
92.484 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.123 140.0 145.0 150.0 155.0 160.0 165.0 168.246 170.0 175.0 180.0 185.0 190.0 195.0 197.369 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 492.958 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.274 0.359 0.401 0.414 0.409 0.395 0.37 0.331 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.25 0.286 0.323 0.36 0.397 0.414 0.449 0.508 0.566 0.625 0.687 0.752 0.821 0.895 0.974 1.061 1.154 1.256 1.366 1.485 1.614 1.752 1.899 2.056 2.222 2.395 2.576 2.763 2.956 3.154 3.355 3.56 3.767 3.977 4.188 4.399 4.612 4.825 5.037 5.249 5.46 5.67 5.878 6.085 6.288 6.489 6.687 6.881 7.07 7.254 7.432 7.605 7.77 7.927 8.075 8.214 8.342 8.459 8.564 8.656 8.734 8.798 8.846 8.88 8.897 8.9 8.899 8.893 8.879 8.859 8.833 8.8 8.762 8.718 8.67 8.616 8.558 8.496 8.429 8.36 8.286 8.21 8.131 8.049 7.964 7.878 7.789 7.699 7.607 7.513 7.419 7.323 7.226 7.129 7.031 6.933 6.834 6.735 6.636 6.537 6.438 6.34 6.241 6.143 6.046 5.948 5.852 5.756 5.661 5.567 5.473 5.38 5.288 5.197 5.107 5.018 4.93 4.843 4.757 4.673 4.589 4.506 4.424 4.344 4.265 4.186 4.109 4.033 3.959 3.885 3.812 3.741 3.671 3.601 3.533 3.466 3.4 3.336 3.272 3.209 3.148 3.087 3.028 2.97 2.912 2.856 2.8 2.746 2.693 2.64 2.589 2.538 2.489 2.44 2.392 2.345 2.299 2.254 2.209 2.166 2.123 2.081 2.04 2.0 1.96 1.921 1.883 1.846

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.414" PeakHeight="110.0" Num="3" Error="0.0">
-20.573 3.301 -0.244
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.414" EndFrequency="8.9" PeakHeight="492.958" Num="5" zHalfNm="390.118" Error="6.059">
-300.11 2.235 3.241 -4.077 3.122
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.369" Depth="0.214"/>
<TopsideChapman PeakHeight="492.958" PeakDensity="982754.3" PeakScaleHeight="76.733" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
