<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 12:40:00.000"
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 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" >
2026.01.27 (027) 12:40:00</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">
FF202602701271240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.349" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.142" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.126" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.235" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="392.369" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.792" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.692" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="187.873" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.540" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="101.705" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="225.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 247.500 255.000 260.000 266.667 273.333 280.000 280.000 284.286 288.571 292.857 297.143 301.429 305.714 310.000 315.000 320.000 322.000 324.000 326.000 328.000 330.000 330.000 332.500 335.000 340.000 340.000 345.000 345.000 350.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 505.000 510.000 515.000 520.000 520.000 535.000 540.000 545.000 550.000 555.000 555.000 565.000 570.000 575.000 580.000 585.000 590.000 596.454 603.492 611.196 619.666 629.022 639.410 651.011 664.051 678.816 695.671 715.095
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 54 51 0 0 51 45 0 0 0 51 0 0 48 51 48 0 0 0 0 54 54 0 57 54 54 51 54 57 54 57 57 51 60 57 60 57 51 60 57 60 57 57 60 60 63 57 60 57 63 60 63 66 60 66 60 66 66 63 66 63 63 60 60 66 66 63 60 57 57 57 45 54 54 60 60 51 57 60 60 60 63 63 57 54 54 51 51 54 51 48 48 0 45 51 51 51 48 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 -2.734375 0.390625 -0.390625 -0.390625 -2.734375 1.171875 -0.390625 -0.390625 0.390625 1.953125 0.390625 0.390625 -0.390625 0.390625 -0.390625 -2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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" >
89.524 90.0 95.0 100.0 105.0 110.0 112.664 115.0 115.327 117.991 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.369 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.102 2.706 3.024 3.126 3.004 3.004 3.004 3.126 3.178 3.307 3.435 3.565 3.698 3.836 3.978 4.125 4.278 4.436 4.597 4.762 4.929 5.097 5.265 5.431 5.595 5.756 5.913 6.067 6.217 6.364 6.507 6.647 6.784 6.918 7.049 7.177 7.303 7.427 7.549 7.669 7.787 7.904 8.019 8.132 8.245 8.356 8.466 8.575 8.683 8.79 8.896 9.0 9.103 9.204 9.303 9.399 9.491 9.578 9.658 9.728 9.785 9.826 9.848 9.85 9.849 9.845 9.836 9.822 9.805 9.783 9.758 9.729 9.696 9.66 9.621 9.578 9.533 9.485 9.434 9.381 9.325 9.267 9.206 9.144 9.079 9.013 8.945 8.876 8.805 8.733 8.659 8.585 8.509 8.432 8.354 8.276 8.197 8.117 8.036 7.955 7.874 7.792 7.71 7.628 7.545 7.463 7.38 7.297 7.215 7.132 7.05 6.967 6.885 6.803 6.722 6.641 6.56 6.479 6.399 6.319 6.24 6.161 6.083 6.006 5.928 5.852 5.776 5.7 5.625 5.551 5.478 5.405 5.332 5.261 5.19 5.12 5.05 4.981 4.913 4.846 4.779 4.713 4.647 4.583 4.519 4.456 4.393 4.331 4.27 4.21 4.15 4.091 4.033 3.975 3.919 3.862 3.807 3.752 3.698 3.645 3.592 3.54 3.489 3.438 3.388 3.339 3.29 3.242 3.195 3.148 3.102 3.056 3.011 2.967 2.923 2.88 2.838 2.796 2.754 2.714 2.673 2.634 2.595 2.556 2.518 2.481

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.126" PeakHeight="110.0" Num="3" Error="0.0">
-30.299 12.854 -3.031
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.126" EndFrequency="9.85" PeakHeight="392.369" Num="5" zHalfNm="246.792" Error="5.437">
-248.982 -43.368 28.587 -14.143 3.528
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.991" Depth="0.122"/>
<TopsideChapman PeakHeight="392.369" PeakDensity="1203753.1" PeakScaleHeight="101.705" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
