<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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) 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">
FF202602701271340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.501" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.513" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.282" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.310" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="353.239" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.388" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.233" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.317" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.195" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="208.400" 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="60">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 387.500 390.000 392.500 395.000 395.000 395.000 398.500 402.000 405.500 409.000 412.500 416.000 419.500 423.000 426.500 430.000 435.000 435.000 435.000 445.000 445.000 450.000 450.000 450.000 460.000 465.000 465.000 470.000 475.000 475.000 485.000 490.000 490.000 495.000 505.000 510.000 515.000 525.000 530.000 535.000 541.988 549.845 558.744 568.907 580.623 594.279 610.399 629.717
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 45 54 63 60 63 63 57 60 54 0 0 0 51 45 48 0 0 0 0 0 0 0 0 0 51 48 60 57 54 60 60 57 63 63 60 63 66 66 63 60 60 60 63 63 63 60 63 66 60 63 66 63 45 0 0 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 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 2.734375 1.953125 -0.390625 0.390625 -0.390625 -0.390625 -1.953125 -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 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -1.171875 -2.734375 -2.734375
</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" >
89.5 90.0 95.0 100.0 105.0 110.0 111.997 113.994 115.0 115.991 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 353.239 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.208 2.84 3.175 3.282 3.16 3.16 3.221 3.282 3.41 3.566 3.719 3.87 4.018 4.163 4.307 4.449 4.588 4.726 4.863 4.997 5.13 5.262 5.393 5.522 5.651 5.778 5.905 6.031 6.156 6.28 6.404 6.527 6.65 6.773 6.895 7.017 7.139 7.26 7.381 7.502 7.623 7.744 7.864 7.983 8.102 8.219 8.335 8.447 8.556 8.66 8.756 8.842 8.913 8.965 8.994 9.0 9.0 8.995 8.985 8.97 8.949 8.924 8.895 8.861 8.823 8.781 8.735 8.686 8.633 8.577 8.519 8.457 8.393 8.326 8.258 8.187 8.114 8.039 7.963 7.885 7.805 7.725 7.643 7.561 7.477 7.393 7.308 7.222 7.136 7.05 6.963 6.876 6.789 6.702 6.615 6.528 6.441 6.354 6.268 6.182 6.096 6.01 5.926 5.841 5.757 5.674 5.591 5.509 5.428 5.347 5.267 5.187 5.109 5.031 4.954 4.878 4.802 4.728 4.654 4.581 4.509 4.437 4.367 4.297 4.229 4.161 4.094 4.028 3.963 3.898 3.835 3.772 3.71 3.649 3.589 3.53 3.472 3.414 3.358 3.302 3.247 3.192 3.139 3.086 3.035 2.984 2.933 2.884 2.835 2.787 2.74 2.694 2.648 2.603 2.559 2.515 2.472 2.43 2.388 2.348 2.307 2.268 2.229 2.191 2.153 2.116 2.08 2.044 2.009 1.974 1.94 1.906 1.873 1.841 1.809 1.778 1.747 1.717 1.687 1.658 1.629 1.601 1.573 1.546 1.519 1.493

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.282" PeakHeight="110.0" Num="3" Error="0.0">
-30.421 13.034 -3.113
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.282" EndFrequency="9.0" PeakHeight="353.239" Num="5" zHalfNm="228.388" Error="2.653">
-206.857 -48.626 22.209 -4.469 0.495
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.991" Depth="0.122"/>
<TopsideChapman PeakHeight="353.239" PeakDensity="1004962.75" PeakScaleHeight="88.195" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
