<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 18:40:00.000"
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 1 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" >
2026.02.01 (032) 18:40:00</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">
FF202603202011840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.525" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.673" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.443" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.878" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="387.363" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="222.490" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="285.194" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.587" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="101.885" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="72.140" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.312" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.941" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
360.000 360.000 365.000 370.000 375.000 377.500 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 415.000 416.250 417.500 418.750 420.000 430.000 430.000 432.500 435.000 437.500 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 515.000 515.000 515.000 515.000 515.000 520.000 520.000 520.000 525.000 525.000 525.000 525.000 530.000 530.000 535.000 535.000 535.000 535.000 540.000 540.000 545.000 555.000 555.000 558.997 563.447 568.431 574.053 580.442 587.767 596.249
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 48 45 0 45 51 45 0 51 54 0 45 45 0 54 57 57 54 54 54 45 51 0 0 57 54 60 0 0 0 0 45 54 0 51 0 51 54 51 57 51 57 54 57 57 57 57 60 57 54 45 54 48 54 51 57 51 57 57 57 51 54 51 57 48 51 0 57 0 54 54 57 54 51 54 54 51 51 54 0 51 51 0 54 51 51 48 48 48 48 48 48 51 0 0
</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 -1.953125 -2.734375 -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 -1.953125 -0.390625 -2.734375 -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 -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 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 255.000 255.000 255.000 255.000 260.000 262.917 265.833 268.750 271.667 274.583 277.500 280.417 283.333 286.250 289.167 292.083 295.000 300.000 305.000 310.000 315.000 321.429 327.857 334.286 340.714 347.143 353.571
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 45 51 0 51 57 0 51 0 0 0 0 0 0 0 0 0 45 54 0 0 54 0 0 45 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -1.953125 -0.390625 0.390625 -2.734375 0.390625 1.171875 1.953125 -1.171875 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 2.734375 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.566 90.0 95.0 100.0 105.0 110.0 113.769 115.0 117.539 120.0 121.308 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.49 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.363 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.934 2.491 2.785 2.878 2.756 2.756 2.756 2.836 2.878 3.012 3.17 3.319 3.466 3.614 3.763 3.913 4.064 4.215 4.366 4.514 4.661 4.805 4.947 5.086 5.222 5.354 5.48 5.59 5.663 5.673 5.736 5.863 5.994 6.129 6.266 6.406 6.549 6.693 6.84 6.987 7.136 7.286 7.436 7.587 7.739 7.891 8.043 8.195 8.348 8.501 8.655 8.809 8.965 9.121 9.279 9.439 9.6 9.764 9.93 10.096 10.26 10.41 10.511 10.525 10.524 10.514 10.494 10.466 10.43 10.386 10.334 10.275 10.21 10.138 10.06 9.978 9.89 9.797 9.701 9.6 9.496 9.389 9.279 9.166 9.052 8.935 8.816 8.696 8.574 8.452 8.328 8.204 8.08 7.955 7.83 7.705 7.58 7.456 7.332 7.209 7.086 6.964 6.843 6.722 6.603 6.485 6.368 6.252 6.137 6.024 5.912 5.801 5.692 5.584 5.478 5.373 5.269 5.167 5.067 4.968 4.87 4.774 4.68 4.587 4.496 4.406 4.317 4.231 4.145 4.061 3.979 3.898 3.819 3.741 3.664 3.589 3.515 3.443 3.372 3.302 3.234 3.167 3.101 3.036 2.973 2.911 2.85 2.791 2.732 2.675 2.619 2.564 2.51 2.457 2.406 2.355 2.305 2.256 2.209 2.162 2.116 2.072 2.028 1.985 1.943 1.901 1.861 1.821 1.783 1.745 1.708 1.671 1.636 1.601 1.567 1.533 1.501 1.469 1.437 1.407 1.377 1.347 1.319 1.29 1.263 1.236 1.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.878" PeakHeight="110.0" Num="3" Error="0.0">
-30.091 12.549 -2.892
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="2.878" EndFrequency="5.673" PeakHeight="222.49" Num="5" Error="0.0">
-82.629 -25.069 7.63 -1.911 0.797
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.673" EndFrequency="10.525" PeakHeight="387.363" Num="5" zHalfNm="285.194" Error="5.031">
-119.659 -54.308 11.713 -2.824 0.205
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.308" Depth="0.122"/>
<TopsideChapman PeakHeight="387.363" PeakDensity="1374387.4" PeakScaleHeight="71.941" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
