<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 22:40:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 22:40:00</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">
FF202602701272240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.186" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.130" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="455.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="455.000" 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="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="661.947" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="546.795" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="470.438" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.545" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.404" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.211" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.682" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="130.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 455.000 455.000 455.000 490.000 490.000 495.000 520.000 519.231 518.462 517.692 516.923 516.154 515.385 514.615 513.846 513.077 512.308 511.538 510.769 510.000 509.231 508.462 507.692 506.923 506.154 505.385 504.615 503.846 503.077 502.308 501.538 500.769 500.000 495.000 515.000 505.000 510.000 510.000 507.500 505.000 502.500 500.000 497.500 495.000 500.000 517.500 535.000 535.000 540.000 540.000 545.000 550.000 555.000 555.000 555.000 555.000 555.000 555.000 555.000 555.000 555.000 555.000 560.000 565.000 565.000 565.000 565.000 565.000 565.000 575.000 575.000 575.000 575.000 572.500 570.000 570.000 570.000 570.000 570.000 571.667 573.333 575.000 576.667 578.333 580.000 581.667 583.333 585.000 585.000 590.000 590.000 585.000 600.000 600.000 600.000 602.500 605.000 625.000 620.000 630.000 630.000 645.000 645.000 645.000 645.000 645.000 649.759 655.332 661.947 669.926 679.741 692.106 708.163 729.859
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 63 66 72 66 54 0 0 0 0 0 69 0 0 60 0 0 0 0 0 0 60 54 0 57 63 66 60 0 0 54 57 69 57 54 63 60 0 0 0 0 0 54 54 54 63 63 63 57 60 0 63 60 60 66 66 66 0 66 0 63 66 63 66 60 60 60 57 60 60 60 60 0 69 66 63 66 66 60 60 66 63 0 0 63 60 69 72 69 69 60 63 63 57 63 60 51 54 54 45 60 57 60 54 57 54 48 0 0 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.953125 -1.171875 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 -2.734375 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -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 -0.390625 1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -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 -1.953125 -0.390625 1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -2.734375 2.734375 -1.953125 -1.953125 -0.390625 -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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.325 145.0 150.0 155.0 160.0 165.0 170.0 174.65 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.975 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 546.795 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.304 0.273 0.227 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.225 0.249 0.273 0.297 0.321 0.345 0.354 0.377 0.419 0.467 0.519 0.576 0.635 0.698 0.762 0.828 0.896 0.965 1.036 1.108 1.182 1.257 1.333 1.412 1.492 1.574 1.658 1.744 1.832 1.922 2.014 2.109 2.206 2.305 2.408 2.513 2.62 2.731 2.845 2.962 3.083 3.207 3.334 3.465 3.6 3.739 3.883 4.03 4.182 4.338 4.499 4.665 4.835 5.011 5.192 5.377 5.568 5.764 5.964 6.169 6.378 6.591 6.806 7.023 7.24 7.455 7.666 7.871 8.065 8.244 8.403 8.538 8.643 8.714 8.747 8.75 8.747 8.733 8.707 8.671 8.624 8.567 8.502 8.428 8.347 8.259 8.165 8.066 7.961 7.852 7.739 7.622 7.503 7.381 7.257 7.131 7.004 6.876 6.747 6.618 6.488 6.359 6.23 6.101 5.973 5.846 5.72 5.595 5.472 5.349 5.229 5.109 4.992 4.876 4.762 4.65 4.54 4.431 4.325 4.22 4.118 4.017 3.918 3.822 3.727 3.634 3.543 3.455 3.368 3.283 3.2 3.118 3.039 2.961 2.886 2.812 2.739 2.669 2.6 2.533 2.467 2.403 2.34 2.28 2.22 2.162 2.106 2.051 1.997 1.944 1.893 1.844 1.795 1.748 1.702 1.657 1.613 1.571 1.529 1.489 1.449 1.411 1.374 1.337 1.302 1.267 1.234

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.75" PeakHeight="546.795" Num="5" zHalfNm="470.438" Error="4.948">
-297.032 -72.156 34.642 -3.393 -1.881
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.975" Depth="0.154"/>
<TopsideChapman PeakHeight="546.795" PeakDensity="949906.94" PeakScaleHeight="57.682" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
