<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.02.05 (036) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603602052240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.403" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.663" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="503.470" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="438.272" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.615" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.047" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.068" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.193" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 430.000 440.000 440.000 445.000 447.500 450.000 455.000 460.000 464.286 468.571 472.857 477.143 481.429 485.714 490.000 490.000 490.000 487.500 485.000 485.000 485.000 486.250 487.500 488.750 490.000 490.000 490.000 490.000 495.000 495.000 495.000 500.000 505.000 505.000 505.000 503.750 502.500 501.250 500.000 500.000 495.000 500.000 500.000 500.000 500.000 500.000 500.000 500.000 500.000 500.000 497.500 495.000 492.500 490.000 490.000 490.000 495.000 497.500 500.000 502.500 505.000 505.000 505.000 505.000 505.000 505.000 505.000 510.000 510.000 515.000 517.500 520.000 521.111 522.222 523.333 524.444 525.556 526.667 527.778 528.889 530.000 530.000 531.667 533.333 535.000 540.000 540.000 540.000 540.000 550.000 560.000 565.000 570.000 572.500 575.000 585.000 587.500 590.000 591.667 593.333 550.000 610.000 611.799 613.929 616.488 619.623 623.552 628.619 635.405 644.960
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 57 54 54 0 51 51 54 0 0 0 0 54 54 54 57 54 0 54 54 60 0 0 54 0 0 57 66 48 54 60 57 66 66 54 0 0 0 57 63 54 63 57 51 0 0 0 54 0 54 0 0 0 51 66 60 63 60 60 0 60 0 57 60 63 60 66 60 63 60 0 57 51 0 48 51 0 0 54 0 54 51 0 0 51 54 0 0 54 0 54 54 54 0 57 48 0 48 45 0 51 48 0 0 0 45 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -0.390625 -1.953125 -1.953125 0.390625 -1.171875 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -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 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -2.734375 -1.953125 1.171875 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -0.390625 -1.953125 -1.953125 -1.953125 0.390625 1.171875 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 0.390625 -1.953125 0.390625 0.390625 -1.171875 -0.390625 1.171875 -0.390625 -2.734375 -0.390625 -1.171875 -0.390625 1.171875
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.358 145.0 150.0 155.0 160.0 165.0 170.0 174.717 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.075 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 503.47 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.225 0.249 0.273 0.297 0.32 0.344 0.354 0.378 0.427 0.484 0.549 0.62 0.695 0.772 0.852 0.933 1.016 1.1 1.185 1.273 1.361 1.452 1.545 1.639 1.736 1.835 1.936 2.04 2.147 2.256 2.368 2.484 2.603 2.725 2.85 2.98 3.113 3.25 3.392 3.538 3.689 3.844 4.005 4.171 4.342 4.519 4.703 4.892 5.087 5.289 5.497 5.712 5.933 6.16 6.393 6.631 6.873 7.117 7.36 7.6 7.831 8.046 8.239 8.4 8.518 8.586 8.6 8.599 8.586 8.556 8.512 8.454 8.384 8.302 8.21 8.109 7.999 7.882 7.759 7.63 7.496 7.359 7.217 7.074 6.928 6.78 6.632 6.483 6.334 6.184 6.036 5.888 5.742 5.597 5.453 5.312 5.172 5.034 4.899 4.766 4.635 4.507 4.381 4.258 4.137 4.02 3.905 3.792 3.682 3.575 3.471 3.369 3.269 3.173 3.078 2.987 2.898 2.811 2.726 2.644 2.564 2.487 2.411 2.338 2.267 2.198 2.131 2.066 2.002 1.941 1.881 1.824 1.768 1.713 1.66 1.609 1.559 1.511 1.464 1.419 1.375 1.333 1.291 1.251 1.212 1.175 1.138 1.103 1.069 1.035 1.003 0.972 0.942 0.912 0.884 0.856 0.83 0.804 0.779 0.755 0.731 0.708 0.686 0.665 0.644 0.624 0.604

</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="8.6" PeakHeight="503.47" Num="5" zHalfNm="438.272" Error="5.278">
-257.762 -66.985 34.595 -4.428 -1.815
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.075" Depth="0.154"/>
<TopsideChapman PeakHeight="503.47" PeakDensity="917617.9" PeakScaleHeight="49.193" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
