<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 22:20:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o 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" >
2026.01.29 (029) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901292220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.503" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="536.753" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="432.215" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="366.951" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.780" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.948" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.072" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.740" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.680" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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" >
355.000 355.000 355.000 355.000 355.000 355.000 356.000 357.000 358.000 359.000 360.000 361.000 362.000 363.000 364.000 365.000 365.000 367.500 370.000 365.000 367.500 370.000 372.500 375.000 375.000 375.000 370.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 383.750 382.500 381.250 380.000 385.000 386.429 387.857 389.286 390.714 392.143 393.571 395.000 395.000 395.000 395.000 397.000 399.000 401.000 403.000 405.000 405.833 406.667 407.500 408.333 409.167 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 437.500 440.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 452.500 455.000 455.000 455.000 457.500 460.000 460.000 465.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 505.000 505.000 510.000 515.000 520.000 522.027 524.289 526.830 529.704 532.981 536.753 541.141 546.309 552.487 560.000 569.336 581.248
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 0 0 63 0 51 0 60 0 0 0 0 0 66 69 0 57 0 0 66 0 54 0 63 0 0 54 57 0 0 0 72 63 0 0 0 0 75 0 0 0 54 0 0 69 69 72 69 0 0 72 0 60 0 0 57 0 0 72 72 69 72 78 72 63 0 0 57 60 69 57 0 69 72 69 69 66 57 60 78 81 78 72 75 72 75 0 69 63 78 63 81 72 72 66 69 69 72 75 75 72 72 69 75 66 72 66 57 69 69 66 69 57 66 63 54 69 66 63 60 60 0 60 57 54 54 60
</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 -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 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 -2.734375 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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.989 145.0 150.0 155.0 160.0 165.0 170.0 171.977 175.0 180.0 185.0 190.0 195.0 200.0 202.966 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 432.215 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.264 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.24 0.265 0.29 0.314 0.339 0.354 0.382 0.454 0.532 0.617 0.71 0.812 0.924 1.046 1.179 1.323 1.477 1.641 1.816 2.0 2.193 2.396 2.607 2.827 3.054 3.29 3.533 3.783 4.041 4.306 4.577 4.855 5.139 5.429 5.725 6.025 6.33 6.638 6.949 7.262 7.573 7.883 8.188 8.485 8.771 9.041 9.289 9.51 9.697 9.844 9.945 9.995 10.0 9.997 9.976 9.937 9.88 9.808 9.721 9.621 9.51 9.388 9.256 9.116 8.969 8.816 8.657 8.493 8.327 8.157 7.985 7.811 7.636 7.461 7.286 7.112 6.938 6.765 6.594 6.425 6.257 6.092 5.929 5.769 5.612 5.457 5.305 5.156 5.011 4.868 4.728 4.592 4.459 4.329 4.202 4.078 3.958 3.84 3.725 3.614 3.505 3.4 3.297 3.197 3.1 3.006 2.914 2.825 2.738 2.654 2.573 2.493 2.417 2.342 2.269 2.199 2.131 2.065 2.001 1.938 1.878 1.82 1.763 1.708 1.655 1.603 1.553 1.504 1.457 1.411 1.367 1.324 1.283 1.243 1.204 1.166 1.129 1.094 1.059 1.026 0.994 0.963 0.932 0.903 0.875 0.847 0.82 0.795 0.77 0.745 0.722 0.699 0.677 0.656 0.635 0.615 0.596 0.577 0.559 0.541 0.524 0.508 0.492 0.476 0.461 0.447 0.433

</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="10.0" PeakHeight="432.215" Num="5" zHalfNm="366.951" Error="2.933">
-219.831 -20.865 15.471 -5.418 1.394
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="92.966" Depth="0.154"/>
<TopsideChapman PeakHeight="432.215" PeakDensity="1240694.8" PeakScaleHeight="48.74" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
