<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 21:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 21:40:00</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">
FF202604002092140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.277" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.178" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" 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="0.648" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="457.228" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="351.796" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="152.445" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.163" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.355" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 321.000 322.000 323.000 324.000 325.000 326.000 327.000 328.000 329.000 330.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 341.000 342.000 343.000 344.000 345.000 346.000 347.000 348.000 349.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 360.000 360.000 360.000 370.000 370.000 372.500 375.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 390.000 391.944 393.889 395.833 397.778 399.722 401.667 403.611 405.556 407.500 409.444 411.389 413.333 415.278 417.222 419.167 421.111 423.056 425.000 425.000 430.000 430.000 430.000 430.000 435.000 440.000 442.500 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 480.000 480.000 485.000 485.000 485.000 490.000 495.000 500.000 500.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 540.000 550.000 555.000 560.000 560.000 567.500 575.000 585.000 590.000 595.000 605.000 610.000 620.000 620.000 625.000 635.000 644.241 654.562 666.163 679.298 694.293 711.574
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 63 63 0 57 54 0 48 0 54 0 57 0 0 0 60 60 60 60 0 0 0 54 54 0 0 0 0 0 0 0 60 0 57 60 0 0 66 0 0 60 0 0 60 66 48 57 69 66 69 63 66 69 63 60 60 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 54 63 60 66 0 0 69 72 0 69 63 66 63 66 0 57 66 66 0 0 57 66 60 63 63 60 63 66 63 63 60 66 66 66 63 60 60 57 60 57 57 57 0 60 54 57 63 51 57 48 63 60 60 60 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 1.171875 -1.171875 -1.171875 -1.953125 1.953125 -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 -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 -2.734375 -1.953125 -1.171875 -2.734375 -1.953125 -0.390625 -1.953125 -1.953125 -1.171875 2.734375 -0.390625 -1.953125 -1.171875 -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 -1.953125 -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 -2.734375 -1.953125 -2.734375 -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" >
90.925 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.805 140.0 145.0 150.0 155.0 160.0 161.61 165.0 170.0 175.0 180.0 185.0 187.415 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 457.228 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.43 0.561 0.627 0.648 0.639 0.61 0.559 0.479 0.347 0.316 0.316 0.316 0.316 0.316 0.316 0.316 0.36 0.424 0.488 0.553 0.617 0.648 0.703 0.788 0.866 0.943 1.023 1.108 1.2 1.3 1.411 1.535 1.675 1.833 2.011 2.21 2.428 2.662 2.907 3.157 3.409 3.658 3.904 4.145 4.381 4.612 4.838 5.06 5.277 5.491 5.701 5.907 6.11 6.31 6.506 6.7 6.89 7.077 7.261 7.441 7.617 7.789 7.957 8.119 8.275 8.425 8.567 8.7 8.823 8.935 9.035 9.12 9.191 9.244 9.28 9.298 9.3 9.299 9.291 9.276 9.254 9.226 9.192 9.152 9.106 9.055 8.999 8.939 8.874 8.805 8.733 8.656 8.577 8.495 8.41 8.322 8.233 8.141 8.047 7.952 7.855 7.757 7.658 7.558 7.457 7.356 7.254 7.152 7.049 6.946 6.844 6.741 6.639 6.537 6.435 6.334 6.233 6.133 6.034 5.935 5.837 5.74 5.643 5.548 5.453 5.36 5.267 5.176 5.085 4.996 4.908 4.821 4.734 4.65 4.566 4.483 4.402 4.321 4.242 4.164 4.087 4.012 3.937 3.864 3.792 3.721 3.651 3.582 3.515 3.448 3.383 3.318 3.255 3.193 3.132 3.072 3.013 2.955 2.898 2.843 2.788 2.734 2.681 2.629 2.578 2.528 2.479 2.43 2.383 2.336 2.291 2.246 2.202 2.159 2.117 2.075 2.034 1.994 1.955 1.917 1.879 1.842 1.806 1.77 1.735 1.701

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.648" PeakHeight="110.0" Num="3" Error="0.0">
-24.179 5.771 -0.667
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.648" EndFrequency="9.3" PeakHeight="457.228" Num="5" zHalfNm="351.796" Error="7.049">
-276.865 4.491 7.477 -11.157 6.241
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.415" Depth="0.332"/>
<TopsideChapman PeakHeight="457.228" PeakDensity="1073076.9" PeakScaleHeight="77.355" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
