<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 13:40:00.000"
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 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" >
2026.01.26 (026) 13:40:00</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">
FF202602601261340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.283" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.831" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.281" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.309" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="399.439" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.070" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="179.655" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.324" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="99.133" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="234.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
365.000 365.000 367.500 370.000 375.000 375.000 377.500 380.000 380.000 380.000 382.500 385.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 422.500 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 465.000 470.000 470.000 475.000 480.000 490.000 495.000 500.000 505.000 510.000 520.000 530.000 535.000 540.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 585.000 585.000 590.000 595.000 600.000 605.000 610.000 615.000 615.000 620.000 625.000 631.612 639.163 647.872 658.024 670.011 684.381 701.923
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 51 51 51 0 54 54 51 0 51 48 54 57 54 57 57 0 57 57 57 48 0 54 48 57 57 54 60 57 57 60 60 60 57 57 57 57 57 57 57 57 51 54 54 48 54 54 45 48 51 54 54 54 57 57 57 57 57 54 51 48 45 45 54 54 54 51 54 51 51 51 45 45
</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
</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" >
89.501 90.0 95.0 100.0 105.0 110.0 112.001 114.002 115.0 116.003 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 399.439 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.207 2.84 3.174 3.281 3.159 3.159 3.22 3.281 3.416 3.564 3.702 3.834 3.965 4.094 4.224 4.354 4.485 4.618 4.752 4.888 5.024 5.161 5.299 5.436 5.574 5.711 5.848 5.983 6.118 6.251 6.383 6.513 6.642 6.77 6.896 7.02 7.143 7.265 7.385 7.504 7.622 7.739 7.855 7.971 8.085 8.199 8.311 8.424 8.536 8.647 8.758 8.868 8.978 9.087 9.196 9.304 9.41 9.515 9.617 9.714 9.805 9.884 9.947 9.988 10.0 10.0 9.997 9.989 9.977 9.96 9.939 9.913 9.884 9.851 9.814 9.774 9.73 9.683 9.633 9.58 9.525 9.466 9.406 9.343 9.278 9.211 9.141 9.071 8.998 8.924 8.848 8.771 8.693 8.614 8.534 8.452 8.37 8.288 8.204 8.12 8.035 7.95 7.865 7.779 7.694 7.608 7.522 7.435 7.349 7.263 7.177 7.092 7.006 6.921 6.836 6.751 6.667 6.583 6.5 6.417 6.334 6.252 6.171 6.09 6.009 5.93 5.85 5.772 5.694 5.617 5.541 5.465 5.39 5.315 5.242 5.169 5.097 5.025 4.955 4.885 4.816 4.747 4.679 4.613 4.546 4.481 4.417 4.353 4.29 4.227 4.166 4.105 4.045 3.986 3.927 3.869 3.812 3.756 3.7 3.645 3.591 3.538 3.485 3.433 3.382 3.331 3.281 3.232 3.184 3.136 3.088 3.042 2.996 2.951 2.906 2.862 2.819 2.776 2.734 2.692 2.651 2.611 2.571 2.532 2.493 2.455

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.281" PeakHeight="110.0" Num="3" Error="0.0">
-30.42 13.033 -3.112
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.281" EndFrequency="10.0" PeakHeight="399.439" Num="5" zHalfNm="257.07" Error="6.333">
-245.053 -63.09 32.755 -11.737 3.689
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.003" Depth="0.122"/>
<TopsideChapman PeakHeight="399.439" PeakDensity="1240694.8" PeakScaleHeight="99.133" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
