<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 21:40:00.000"
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: 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" >
2026.01.27 (027) 21:40:00</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">
FF202602701272140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.362" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.212" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.646" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="451.854" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="367.988" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.219" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.851" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.871" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.173" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.0 3.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.500 351.000 351.500 352.000 352.500 353.000 353.500 354.000 354.500 355.000 360.000 361.667 363.333 365.000 365.000 365.000 365.000 365.000 367.500 370.000 371.000 372.000 373.000 374.000 375.000 375.000 375.000 377.500 380.000 380.909 381.818 382.727 383.636 384.545 385.455 386.364 387.273 388.182 389.091 390.000 390.000 391.667 393.333 395.000 400.000 400.000 405.000 405.000 406.250 407.500 408.750 410.000 411.667 413.333 415.000 420.000 422.000 424.000 426.000 428.000 430.000 430.000 430.000 431.250 432.500 433.750 435.000 440.000 441.667 443.333 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 471.250 472.500 473.750 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 490.000 495.000 497.500 500.000 505.000 505.000 505.000 510.000 515.000 515.000 515.000 520.000 525.000 525.000 525.000 530.000 530.000 535.000 540.000 540.000 545.000 550.000 550.000 555.000 560.000 565.000 570.000 575.000 580.843 587.295 594.457 602.451 611.432 621.594 633.189 646.540 662.080
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 0 66 60 0 0 0 72 0 0 0 0 0 0 0 0 0 0 63 57 0 0 57 63 0 0 69 0 60 0 0 0 0 63 0 69 0 66 0 60 0 51 69 0 0 69 0 0 0 69 0 0 0 72 0 69 69 0 0 0 69 0 0 69 66 0 0 0 0 60 66 69 0 0 0 69 63 0 0 63 66 54 69 63 0 0 66 0 60 66 54 60 66 57 63 0 60 0 69 72 66 69 60 66 54 0 66 66 63 0 63 54 63 66 63 54 63 69 63 51 63 66 63 66 63 57 63 63 60 57 0 0 60 60 57 57 57 57 54 54 51 0 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -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 -1.953125 -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 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.932 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.837 140.0 145.0 150.0 155.0 160.0 161.674 165.0 170.0 175.0 180.0 185.0 187.511 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 451.854 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.428 0.56 0.625 0.646 0.637 0.608 0.558 0.478 0.347 0.315 0.315 0.315 0.315 0.315 0.315 0.315 0.358 0.422 0.486 0.55 0.614 0.646 0.699 0.791 0.878 0.966 1.056 1.15 1.25 1.356 1.469 1.59 1.719 1.857 2.005 2.162 2.328 2.504 2.688 2.881 3.081 3.289 3.502 3.721 3.945 4.174 4.406 4.641 4.879 5.12 5.363 5.607 5.854 6.101 6.35 6.599 6.849 7.099 7.348 7.596 7.843 8.088 8.328 8.565 8.796 9.019 9.232 9.434 9.62 9.789 9.937 10.06 10.154 10.218 10.248 10.25 10.247 10.233 10.207 10.17 10.122 10.065 9.998 9.922 9.839 9.749 9.651 9.548 9.439 9.325 9.207 9.084 8.959 8.83 8.698 8.564 8.428 8.291 8.152 8.012 7.872 7.731 7.591 7.45 7.31 7.17 7.031 6.892 6.755 6.619 6.484 6.35 6.218 6.087 5.958 5.831 5.705 5.581 5.459 5.339 5.221 5.104 4.99 4.878 4.767 4.659 4.552 4.448 4.345 4.245 4.147 4.05 3.955 3.863 3.772 3.683 3.596 3.511 3.428 3.346 3.266 3.188 3.112 3.037 2.964 2.893 2.823 2.755 2.689 2.624 2.56 2.498 2.437 2.378 2.32 2.264 2.208 2.154 2.102 2.05 2.0 1.951 1.904 1.857 1.811 1.767 1.724 1.681 1.64 1.6 1.56 1.522 1.484 1.448 1.412 1.377 1.343 1.31 1.278 1.246 1.216 1.186 1.156 1.128 1.1 1.073

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.646" PeakHeight="110.0" Num="3" Error="0.0">
-24.159 5.755 -0.664
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.646" EndFrequency="10.25" PeakHeight="451.854" Num="5" zHalfNm="367.988" Error="3.844">
-250.613 -24.891 14.146 -6.201 3.216
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.511" Depth="0.331"/>
<TopsideChapman PeakHeight="451.854" PeakDensity="1303505.0" PeakScaleHeight="62.173" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
