<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 18:00:00.000"
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" >
2026.02.05 (036) 18:00:00</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">
FF202603602051800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.529" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.287" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.066" 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="/" />
<Modeled Name="foF1p" Val="4.207" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="352.758" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.136" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="130.335" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.347" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.852" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 261.667 268.333 275.000 275.000 285.000 280.000 290.000 285.000 287.381 289.762 292.143 294.524 296.905 299.286 301.667 304.048 306.429 308.810 311.190 313.571 315.952 318.333 320.714 323.095 325.476 327.857 330.238 332.619 335.000 335.000 340.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 372.500 375.000 377.500 380.000 382.500 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 510.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 535.000 535.000 545.000 545.000 555.000 560.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 45 63 51 48 48 60 45 0 0 0 0 0 0 0 48 63 0 0 0 63 0 63 63 63 60 0 60 60 0 54 51 57 0 60 51 51 0 0 0 54 51 45 0 51 48 51 0 57 0 60 0 0 0 57 51 57 48 54 45 54 51 45 54 48 57 54 63 60 63 57 54 54 54 57 54 57 60 57 54 54 57 57 54 54 57 60 57 54 57 57 54 57 54 54 54 48 51 48 45 48 48 48 48 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 2.734375 -2.734375 -0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -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 -1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 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 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.535 90.0 95.0 100.0 105.0 110.0 112.924 115.0 115.847 118.771 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 352.758 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.061 2.654 2.966 3.066 2.944 2.944 2.944 3.066 3.104 3.248 3.386 3.521 3.656 3.791 3.929 4.07 4.215 4.362 4.514 4.669 4.827 4.988 5.15 5.315 5.481 5.646 5.812 5.977 6.142 6.305 6.466 6.626 6.785 6.942 7.098 7.252 7.405 7.557 7.708 7.858 8.008 8.157 8.306 8.454 8.603 8.753 8.902 9.053 9.203 9.354 9.505 9.652 9.792 9.911 9.988 10.0 9.999 9.99 9.973 9.947 9.913 9.871 9.822 9.767 9.705 9.637 9.564 9.485 9.402 9.314 9.223 9.127 9.029 8.927 8.822 8.715 8.606 8.495 8.382 8.268 8.152 8.036 7.918 7.8 7.682 7.563 7.444 7.326 7.207 7.089 6.971 6.853 6.736 6.62 6.505 6.391 6.277 6.165 6.053 5.943 5.834 5.726 5.619 5.514 5.41 5.307 5.206 5.106 5.008 4.911 4.815 4.721 4.628 4.537 4.447 4.359 4.272 4.186 4.102 4.02 3.938 3.859 3.78 3.703 3.628 3.554 3.481 3.409 3.339 3.27 3.203 3.136 3.071 3.008 2.945 2.884 2.824 2.765 2.707 2.65 2.595 2.54 2.487 2.435 2.383 2.333 2.284 2.236 2.189 2.142 2.097 2.053 2.009 1.966 1.925 1.884 1.844 1.805 1.766 1.729 1.692 1.656 1.621 1.586 1.552 1.519 1.487 1.455 1.424 1.394 1.364 1.335 1.306 1.278 1.251 1.224 1.198 1.172 1.147 1.123 1.099 1.075 1.052 1.03 1.007 0.986

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.066" PeakHeight="110.0" Num="3" Error="0.0">
-30.25 12.783 -2.998
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.066" EndFrequency="10.0" PeakHeight="352.758" Num="5" zHalfNm="249.136" Error="4.873">
-189.617 -64.144 27.127 -10.479 3.126
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.771" Depth="0.122"/>
<TopsideChapman PeakHeight="352.758" PeakDensity="1240694.8" PeakScaleHeight="71.852" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
