<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 21:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.07 (038) 21:00:00</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">
FF202603802072100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.722" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.583" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.447" 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="356.349" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="287.546" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.235" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="97.712" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.070" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.906" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.100" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<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 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 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 282.500 280.000 285.000 290.000 290.000 290.000 290.000 291.250 292.500 293.750 295.000 295.000 294.167 293.333 292.500 291.667 290.833 290.000 290.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 306.000 307.000 308.000 309.000 310.000 310.000 315.000 315.000 315.000 316.364 317.727 319.091 320.455 321.818 323.182 324.545 325.909 327.273 328.636 330.000 330.000 330.000 330.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 392.000 394.000 396.000 398.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 410.000 412.500 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 441.667 443.333 445.000 445.000 450.000 450.000 455.000 457.500 460.000 460.000 465.000 465.000 470.000 475.000 480.000 487.216 496.446 508.671 525.630
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 0 0 0 0 0 63 60 0 54 72 57 60 60 60 0 0 0 0 60 0 0 0 0 0 60 57 69 0 0 63 66 66 63 63 63 0 0 0 57 0 0 0 0 66 63 66 69 63 0 0 0 60 0 0 0 0 0 0 66 69 57 0 69 72 0 0 0 63 72 78 66 0 75 78 72 69 78 66 69 69 69 0 69 75 72 72 69 51 69 60 69 66 66 69 72 57 72 72 63 0 0 0 0 66 51 57 60 48 60 72 75 63 69 75 63 66 75 66 66 69 63 51 51 60 54 60 0 0 63 63 60 60 66 60 66 63 60 57 57 60 57 51 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 1.953125 -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 -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 -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 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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 130.000 130.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 60 0 0 0 0 0 0 0 54 0 69 75 51 54 72 0 63 0 0 0 0 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
</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" >
89.959 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.658 125.0 130.0 133.317 135.0 140.0 144.975 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.349 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.204 0.967 1.254 1.401 1.447 1.42 1.339 1.298 1.298 1.298 1.298 1.32 1.383 1.447 1.448 1.593 1.724 1.853 1.983 2.118 2.257 2.404 2.56 2.725 2.9 3.086 3.283 3.49 3.709 3.937 4.173 4.417 4.666 4.92 5.178 5.438 5.7 5.964 6.228 6.493 6.758 7.023 7.289 7.555 7.822 8.088 8.354 8.62 8.885 9.148 9.407 9.658 9.898 10.116 10.301 10.434 10.497 10.5 10.495 10.47 10.428 10.368 10.293 10.203 10.101 9.986 9.861 9.727 9.584 9.433 9.277 9.114 8.948 8.777 8.604 8.428 8.25 8.071 7.892 7.712 7.533 7.354 7.177 7.0 6.826 6.653 6.483 6.314 6.149 5.986 5.825 5.668 5.513 5.362 5.214 5.068 4.926 4.787 4.651 4.519 4.389 4.263 4.139 4.019 3.902 3.788 3.677 3.569 3.463 3.361 3.261 3.164 3.07 2.978 2.889 2.802 2.718 2.636 2.557 2.48 2.405 2.332 2.262 2.193 2.126 2.062 1.999 1.938 1.879 1.822 1.767 1.713 1.66 1.61 1.56 1.513 1.466 1.422 1.378 1.336 1.295 1.255 1.217 1.179 1.143 1.108 1.074 1.041 1.009 0.978 0.948 0.919 0.891 0.863 0.837 0.811 0.786 0.762 0.738 0.716 0.694 0.672 0.652 0.632 0.612 0.593 0.575 0.557 0.54 0.523 0.507 0.492 0.477 0.462 0.448 0.434 0.421 0.408 0.395 0.383 0.371 0.36 0.349 0.338 0.327 0.317 0.308

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.447" PeakHeight="110.0" Num="3" Error="0.0">
-27.997 9.727 -1.771
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.447" EndFrequency="10.5" PeakHeight="356.349" Num="5" zHalfNm="287.546" Error="3.746">
-180.775 -42.894 16.37 -7.21 3.135
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.975" Depth="0.149"/>
<TopsideChapman PeakHeight="356.349" PeakDensity="1367866.0" PeakScaleHeight="49.906" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
